t: new
o: /modules/libpref/init/StaticPrefList.yaml

+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+# This file defines static prefs, i.e. those that are defined at startup and
+# used entirely or mostly from C++ and/or Rust code.
+#
+# The file is separated into sections, where each section contains a group of
+# prefs that all share the same first segment of their name -- all the "gfx.*"
+# prefs are together, all the "network.*" prefs are together, etc. Sections
+# must be kept in alphabetical order, but prefs within sections need not be.
+#
+# Basics
+# ------
+# Any pref defined in one of the files included here should *not* be defined
+# in a data file such as all.js; that would just be useless duplication.
+#
+# (Except under unusual circumstances where the value defined here must be
+# overridden, e.g. for some Thunderbird prefs. In those cases the default
+# value from the data file will override the static default value defined
+# here.)
+#
+# Please follow the existing prefs naming convention when considering adding a
+# new pref, and don't create a new pref group unless it's appropriate and there
+# are likely to be multiple prefs within that group. (If you do, you'll need to
+# update the `pref_groups` variable in modules/libpref/moz.build.)
+#
+# Definitions
+# -----------
+# A pref definition looks like this:
+#
+#   - name: <pref-name>                                 # mandatory
+#     type: <cpp-type>                                  # mandatory
+#     value: <default-value>                            # mandatory
+#     mirror: <never | once | always>                   # mandatory
+#     do_not_use_directly: <true | false>               # optional
+#     include: <header-file>                            # optional
+#     rust: <true | false>                              # optional
+#     set_spidermonkey_pref: <false | startup | always> # optional
+#
+# - `name` is the name of the pref, without double-quotes, as it appears
+#   in about:config. It is used in most libpref API functions (from both C++
+#   and JS code).
+#
+# - `type` is one of `bool`, `int32_t`, `uint32_t`, `float`, an atomic version
+#   of one of those, `String` or `DataMutexString`. Note that float prefs are
+#   stored internally as strings. The C++ preprocessor doesn't like template
+#   syntax in a macro argument, so use the typedefs defined in
+#   StaticPrefsBase.h; for example, use `RelaxedAtomicBool` instead of
+#   `Atomic<bool, Relaxed>`.
+#
+# - `value` is the default value. Its type should be appropriate for
+#   <cpp-type>, otherwise the generated code will fail to compile. A complex
+#   C++ numeric expressions like `60 * 60` (which the YAML parser cannot treat
+#   as an integer or float) is treated as a string and passed through without
+#   change, which is useful.
+#
+# - `mirror` indicates how the pref value is mirrored into a C++ variable.
+#
+#   * `never`: There is no C++ mirror variable. The pref value can only be
+#     accessed via the standard libpref API functions.
+#
+#   * `once`: The pref value is mirrored into a variable at startup; the
+#     mirror variable is left unchanged after that. (The exact point at which
+#     all `once` mirror variables are set is when the first `once` mirror
+#     variable is accessed, via its getter function.) This is mostly useful for
+#     graphics prefs where we often don't want a new pref value to apply until
+#     restart. Otherwise, this update policy is best avoided because its
+#     behaviour can cause confusion and bugs.
+#
+#   * `always`: The mirror variable is always kept in sync with the pref value.
+#     This is the most common choice.
+#
+#   When a mirror variable is present, a getter will be created that can access
+#   it. Using the getter function to read the pref's value has the two
+#   following advantages over the normal API functions.
+#
+#   * A direct variable access is faster than a hash table lookup.
+#
+#   * A mirror variable can be accessed off the main thread. If a pref *is*
+#     accessed off the main thread, it should have an atomic type. Assertions
+#     enforce this.
+#
+#   Note that Rust code must access the mirror variable directly, rather than
+#   via the getter function.
+#
+# - `do_not_use_directly` indicates if `_DoNotUseDirectly` should be appended to
+#   the name of the getter function. This is simply a naming convention
+#   indicating that there is some other wrapper getter function that should be
+#   used in preference to the normal static pref getter. Defaults to `false` if
+#   not present. Cannot be used with a `never` mirror value, because there is
+#   no getter function in that case.
+#
+# - `include` names a header file that must be included for the pref value to
+#   compile correctly, e.g. because it refers to a code constant. System
+#   headers should be surrounded with angle brackets, e.g. `<cmath>`.
+#
+# - `rust` indicates if the mirror variable is used by Rust code. If so, it
+#   will be usable via the `static_prefs::pref!` macro, e.g.
+#   `static_prefs::pref!("layout.css.cross-fade.enabled")`.
+#
+# - `set_spidermonkey_pref` indicates whether SpiderMonkey boilerplate code
+#   should be generated for this pref. If this is set to 'startup', the
+#   pref on the SpiderMonkey side is only set during process startup. If set to
+#   'always', the SpiderMonkey pref value is also updated when this pref is
+#   changed at runtime.
+#   This option is only valid for javascript.options.* prefs.
+#
+# The getter function's base name is the same as the pref's name, but with
+# '.' or '-' chars converted to '_', to make a valid identifier. For example,
+# the getter for `foo.bar_baz` is `foo_bar_baz()`. This is ugly but clear,
+# and you can search for both the pref name and the getter using the regexp
+# /foo.bar.baz/. Suffixes are added as follows:
+#
+# - If the `mirror` value is `once`, `_AtStartup` is appended, to indicate the
+#   value was obtained at startup.
+#
+# - If the `do_not_use_directly` value is true, `_DoNotUseDirectly` is
+#   appended.
+#
+# Preprocessor
+# ------------
+# Note finally that this file is preprocessed by preprocessor.py, not the C++
+# preprocessor. As a result, the following things may be surprising.
+#
+# - YAML comments start with a '#', so putting a comment on the same line as a
+#   preprocessor directive is dubious. E.g. avoid lines like `#define X 3 #
+#   three` because the ` # three` will be part of `X`.
+#
+# - '@' use is required for substitutions to occur. E.g. with `#define FOO 1`,
+#   `FOO` won't be replaced with `1` unless it has '@' chars around it.
+#
+# - Spaces aren't permitted between the leading '#' and the name of a
+#   directive, e.g. `#ifdef XYZ` works but `# ifdef XYZ` does not.
+#
+# Please indent all prefs defined within #ifdef/#ifndef conditions. This
+# improves readability, particular for conditional blocks that exceed a single
+# screen. But note that the leading '-' in a definition must remain in the
+# first column for it to be valid YAML.
+
+#ifdef RELEASE_OR_BETA
+#define IS_NOT_RELEASE_OR_BETA false
+#else
+#define IS_NOT_RELEASE_OR_BETA true
+#endif
+
+#ifdef NIGHTLY_BUILD
+#define IS_NIGHTLY_BUILD      true
+#define IS_NOT_NIGHTLY_BUILD  false
+#else
+#define IS_NIGHTLY_BUILD      false
+#define IS_NOT_NIGHTLY_BUILD  true
+#endif
+
+#if defined(NIGHTLY_BUILD) || defined(MOZ_DEV_EDITION)
+#define IS_NIGHTLY_OR_DEV_EDITION true
+#else
+#define IS_NIGHTLY_OR_DEV_EDITION false
+#endif
+
+#ifdef MOZILLA_OFFICIAL
+#define IS_NOT_MOZILLA_OFFICIAL false
+#else
+#define IS_NOT_MOZILLA_OFFICIAL true
+#endif
+
+#ifdef EARLY_BETA_OR_EARLIER
+#define IS_EARLY_BETA_OR_EARLIER true
+#define IS_NOT_EARLY_BETA_OR_EARLIER false
+#else
+#define IS_EARLY_BETA_OR_EARLIER false
+#define IS_NOT_EARLY_BETA_OR_EARLIER true
+#endif
+
+#if defined(MOZ_DEV_EDITION) || defined(EARLY_BETA_OR_EARLIER)
+#define IS_DEV_EDITION_OR_EARLY_BETA_OR_EARLIER true
+#else
+#define IS_DEV_EDITION_OR_EARLY_BETA_OR_EARLIER false
+#endif
+
+#ifdef ANDROID
+#define IS_ANDROID true
+#define IS_NOT_ANDROID false
+#else
+#define IS_ANDROID false
+#define IS_NOT_ANDROID true
+#endif
+
+#ifdef XP_WIN
+#define IS_XP_WIN true
+#define IS_NOT_XP_WIN false
+#else
+#define IS_XP_WIN false
+#define IS_NOT_XP_WIN true
+#endif
+
+#ifdef XP_MACOSX
+#define IS_XP_MACOSX true
+#define IS_NOT_XP_MACOSX false
+#else
+#define IS_XP_MACOSX false
+#define IS_NOT_XP_MACOSX true
+#endif
+
+#---------------------------------------------------------------------------
+# Prefs starting with "accessibility."
+#---------------------------------------------------------------------------
+
+# Tab focus model bit field:
+# 1 focuses text controls, 2 focuses other form elements, 4 adds links.
+# Most users will want 1, 3, or 7. On macOS we expose a checkbox to alter
+# between 7 and 3.
+- name: accessibility.tabfocus
+  type: int32_t
+  value: 7
+  mirror: always
+
+# Only on mac tabfocus is expected to handle UI widgets as well as web content.
+# FIXME(emilio): This is weird now that we have a lot of HTML in our pages.
+- name: accessibility.tabfocus_applies_to_xul
+  type: bool
+  value: @IS_XP_MACOSX@
+  mirror: always
+
+- name: accessibility.accesskeycausesactivation
+  type: bool
+  value: true
+  mirror: always
+
+- name: accessibility.monoaudio.enable
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: accessibility.browsewithcaret
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: accessibility.AOM.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: accessibility.ARIAElementReflection.enabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Whether to enable all accessibility cache domains on startup.
+#  * false: enable domains as needed
+#  * true:  enable all domains regardless of need (cache everything)
+- name: accessibility.enable_all_cache_domains
+  type: bool
+  value: false
+  mirror: once
+
+# Whether form controls and images should be focusable with mouse, in content
+# documents.
+#
+# This matches historical macOS / Safari behavior.
+#
+#  * 0: never
+#  * 1: always
+#  * 2: on content documents
+- name: accessibility.mouse_focuses_formcontrol
+  type: int32_t
+#ifdef XP_MACOSX
+  value: 2
+#else
+  value: 1
+#endif
+  mirror: always
+
+# Whether to enable support for the UI Automation API on Windows.
+- name: accessibility.uia.enable
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to avoid accessibility activation on Windows shortly after clipboard
+# copy.
+#
+# Possible values are:
+#  * 0: never
+#  * 1: always
+#  * 2 (or others): when needed
+- name: accessibility.windows.suppress-after-clipboard-copy
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Whether to avoid accessibility activation on Windows shortly after max button
+# hit-test for the "snap layout" feature.
+#
+# Possible values are:
+#  * 0: never
+#  * 1: always
+#  * 2 (or others): when needed
+- name: accessibility.windows.suppress-for-snap-layout
+  type: uint32_t
+  value: 2
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "alerts."
+#---------------------------------------------------------------------------
+
+# Whether to use platform-specific backends for showing desktop notifications.
+# If no such backend is available, or if the pref is false, then XUL
+# notifications are used.
+- name: alerts.useSystemBackend
+  type: bool
+  value: true
+  mirror: always
+
+#if defined(XP_WIN)
+ # On Windows, a COM Surrogate notification server receives notification events
+ # and can relaunch the application after it has been closed.
+- name: alerts.useSystemBackend.windows.notificationserver.enabled
+  type: bool
+  value: true
+  mirror: never
+#endif
+
+#ifdef ANDROID
+  #---------------------------------------------------------------------------
+  # Prefs starting with "android."
+  #---------------------------------------------------------------------------
+
+  # On Android, we want an opaque background to be visible under the page,
+  # so layout should not force a default background.
+-   name: android.widget_paints_background
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: android.touch_resampling.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+#endif
+
+#---------------------------------------------------------------------------
+# Prefs starting with "apz."
+# The apz prefs are explained in AsyncPanZoomController.cpp
+#---------------------------------------------------------------------------
+
+# amount we zoom in for a double tap gesture if we couldn't find any content
+# based rect to zoom to
+- name: apz.doubletapzoom.defaultzoomin
+  type: AtomicFloat
+  value: 1.2f
+  mirror: always
+
+- name: apz.scrollbarbuttonrepeat.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# After a user has executed a pan gesture, we may receive momentum phase pan
+# gestures from the OS. This specifies how long we should wait following the
+# pan end gesture for possible momentum phase pan gestures before sending the
+# TransformEnd notification.
+
+- name: apz.scrollend-event.content.delay_ms
+  type: RelaxedAtomicInt32
+  value: 100
+  mirror: always
+
+- name: apz.wr.activate_all_scroll_frames
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.wr.activate_all_scroll_frames_when_fission
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.prefer_jank_minimal_displayports
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.allow_double_tap_zooming
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.mac.enable_double_tap_zoom_touchpad_gesture
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.allow_immediate_handoff
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.allow_zooming
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.max_zoom
+  type: AtomicFloat
+  value: 10.0f
+  mirror: always
+
+- name: apz.min_zoom
+  type: AtomicFloat
+  value: 0.25f
+  mirror: always
+
+- name: apz.allow_zooming_out
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.android.chrome_fling_physics.friction
+  type: AtomicFloat
+  value: 0.015f
+  mirror: always
+
+- name: apz.android.chrome_fling_physics.inflexion
+  type: AtomicFloat
+  value: 0.35f
+  mirror: always
+
+- name: apz.android.chrome_fling_physics.stop_threshold
+  type: AtomicFloat
+  value: 0.1f
+  mirror: always
+
+- name: apz.autoscroll.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.axis_lock.breakout_angle
+  type: AtomicFloat
+  value: float(M_PI / 8.0)    # 22.5 degrees
+  mirror: always
+  include: <cmath>
+
+- name: apz.axis_lock.breakout_threshold
+  type: AtomicFloat
+  value: 1.0f / 32.0f
+  mirror: always
+
+- name: apz.axis_lock.direct_pan_angle
+  type: AtomicFloat
+  value: float(M_PI / 3.0)    # 60 degrees
+  mirror: always
+  include: <cmath>
+
+- name: apz.axis_lock.lock_angle
+  type: AtomicFloat
+  value: float(M_PI / 6.0)    # 30 degrees
+  mirror: always
+  include: <cmath>
+
+# Whether to lock touch scrolling to one axis at a time. When a new
+# axis lock mode is added, the APZCAxisLockCompatTester GTest shoud
+# be updated to include the lock mode value.
+# 0 = FREE (No locking at all)
+# 1 = STANDARD (Once locked, remain locked until scrolling ends)
+# 2 = STICKY (Allow lock to be broken, with hysteresis)
+# 3 = DOMINANT_AXIS (Only allow movement on one axis at a time, only
+#     applies to touchpad scrolling)
+- name: apz.axis_lock.mode
+  type: RelaxedAtomicInt32
+#if defined(XP_MACOSX)
+  value: 3
+#else
+  value: 2
+#endif
+  mirror: always
+
+- name: apz.content_response_timeout
+  type: RelaxedAtomicInt32
+  value: 400
+  mirror: always
+
+- name: apz.danger_zone_x
+  type: RelaxedAtomicInt32
+  value: 50
+  mirror: always
+
+- name: apz.danger_zone_y
+  type: RelaxedAtomicInt32
+  value: 100
+  mirror: always
+
+- name: apz.disable_for_scroll_linked_effects
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.displayport_expiry_ms
+  type: RelaxedAtomicUint32
+  value: 15000
+  mirror: always
+
+- name: apz.drag.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.drag.touch.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.enlarge_displayport_when_clipped
+  type: RelaxedAtomicBool
+  value: @IS_ANDROID@
+  mirror: always
+
+# Test only.
+- name: apz.fixed-margin-override.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Test only.
+- name: apz.fixed-margin-override.bottom
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Test only.
+- name: apz.fixed-margin-override.top
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: apz.fling_accel_base_mult
+  type: AtomicFloat
+  value: 1.0f
+  mirror: always
+
+- name: apz.fling_accel_supplemental_mult
+  type: AtomicFloat
+  value: 1.0f
+  mirror: always
+
+- name: apz.fling_accel_min_fling_velocity
+  type: AtomicFloat
+  value: 1.5f
+  mirror: always
+
+- name: apz.fling_accel_min_pan_velocity
+  type: AtomicFloat
+  value: 0.8f
+  mirror: always
+
+- name: apz.fling_accel_max_pause_interval_ms
+  type: RelaxedAtomicInt32
+  value: 50
+  mirror: always
+
+- name: apz.fling_curve_function_x1
+  type: float
+  value: 0.0f
+  mirror: once
+
+- name: apz.fling_curve_function_x2
+  type: float
+  value: 1.0f
+  mirror: once
+
+- name: apz.fling_curve_function_y1
+  type: float
+  value: 0.0f
+  mirror: once
+
+- name: apz.fling_curve_function_y2
+  type: float
+  value: 1.0f
+  mirror: once
+
+- name: apz.fling_curve_threshold_inches_per_ms
+  type: AtomicFloat
+  value: -1.0f
+  mirror: always
+
+- name: apz.fling_friction
+  type: AtomicFloat
+  value: 0.002f
+  mirror: always
+
+- name: apz.fling_min_velocity_threshold
+  type: AtomicFloat
+  value: 0.5f
+  mirror: always
+
+- name: apz.fling_stop_on_tap_threshold
+  type: AtomicFloat
+  value: 0.05f
+  mirror: always
+
+- name: apz.fling_stopped_threshold
+  type: AtomicFloat
+  value: 0.01f
+  mirror: always
+
+- name: apz.touch_acceleration_factor_x
+  type: float
+  value: 1.0f
+  mirror: always
+
+- name: apz.touch_acceleration_factor_y
+  type: float
+  value: 1.0f
+  mirror: always
+
+#ifdef MOZ_WIDGET_GTK
+-   name: apz.gtk.kinetic_scroll.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: apz.gtk.pangesture.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+# Mode to use when receiving pan gesture input.
+#
+#  * 0: Auto mode (uses the default behavior, subject to change).
+#  * 1: Page mode: Uses gtk deltas as a percentage of the page size to scroll. This mode matches:
+#
+#    https://gitlab.gnome.org/GNOME/gtk/blob/c734c7e9188b56f56c3a504abee05fa40c5475ac/gtk/gtkrange.c#L3063-3074
+#
+#  * 2: Pixel mode: Uses gtk deltas as a fixed pixel multiplier. This mode matches e.g. GNOME web.
+#
+#    https://webkit-search.igalia.com/webkit/rev/215039ef09d6bfd6e088175bfe30788d95b9705d/Source/WebKit/Shared/gtk/WebEventFactory.cpp#265-296
+#    (multiplied then by pixelsPerLineStep which in GNOME-web is 40).
+-   name: apz.gtk.pangesture.delta_mode
+    type: uint32_t
+    value: 0
+    mirror: always
+
+-   name: apz.gtk.pangesture.page_delta_mode_multiplier
+    type: float
+    value: 1.0f
+    mirror: always
+
+-   name: apz.gtk.pangesture.pixel_delta_mode_multiplier
+    type: float
+    value: 40.0f
+    mirror: always
+
+-   name: apz.gtk.touchpad_pinch.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: apz.gtk.touchpad_pinch.three_fingers.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+-   name: apz.gtk.touchpad_hold.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#endif
+
+- name: apz.keyboard.enabled
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: once
+
+- name: apz.keyboard.passive-listeners
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+- name: apz.max_tap_time
+  type: RelaxedAtomicInt32
+  value: 300
+  mirror: always
+
+- name: apz.max_velocity_inches_per_ms
+  type: AtomicFloat
+  value: -1.0f
+  mirror: always
+
+- name: apz.max_velocity_queue_size
+  type: uint32_t
+  value: 5
+  mirror: once
+
+- name: apz.min_skate_speed
+  type: AtomicFloat
+  value: 1.0f
+  mirror: always
+
+- name: apz.minimap.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.one_touch_pinch.enabled
+  type: RelaxedAtomicBool
+  value: @IS_ANDROID@
+  mirror: always
+
+- name: apz.overscroll.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The "test async scroll offset" (used via reftest-async-scroll
+# or nsIDOMWindowUtils.setAsyncScrollOffset()) can be used to
+# trigger overscroll. Used for tests only.
+- name: apz.overscroll.test_async_scroll_offset.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.overscroll.min_pan_distance_ratio
+  type: AtomicFloat
+  value: 1.0f
+  mirror: always
+
+- name: apz.overscroll.stop_distance_threshold
+  type: AtomicFloat
+  value: 5.0f
+  mirror: always
+
+- name: apz.overscroll.spring_stiffness
+  type: AtomicFloat
+  value: 200
+  mirror: always
+
+- name: apz.overscroll.damping
+  type: AtomicFloat
+  value: 1.1
+  mirror: always
+
+- name: apz.overscroll.max_velocity
+  type: AtomicFloat
+  value: 10
+  mirror: always
+
+- name: apz.paint_skipping.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Fetch displayport updates early from the message queue.
+- name: apz.pinch_lock.mode
+  type: RelaxedAtomicInt32
+  value: 2
+  mirror: always
+
+- name: apz.pinch_lock.scroll_lock_threshold
+  type: AtomicFloat
+  value: 1.0f / 16.0f   # 1/16 inches
+  mirror: always
+
+- name: apz.pinch_lock.span_breakout_threshold
+  type: AtomicFloat
+  value: 1.0f / 32.0f   # 1/32 inches
+  mirror: always
+
+- name: apz.pinch_lock.span_lock_threshold
+  type: AtomicFloat
+  value: 1.0f / 32.0f   # 1/32 inches
+  mirror: always
+
+- name: apz.pinch_lock.buffer_max_age
+  type: int32_t
+  value: 80   # milliseconds
+  mirror: once
+
+- name: apz.popups.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.popups_without_remote.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to print the APZC tree for debugging.
+- name: apz.printtree
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.record_checkerboarding
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+- name: apz.second_tap_tolerance
+  type: AtomicFloat
+  value: 0.5f
+  mirror: always
+
+# If this is true, APZ fully recalculates the scroll thumb size and
+# position in the compositor. This leads to the size and position
+# being more accurate in scenarios such as async zooming.
+- name: apz.scrollthumb.recalc
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.test.fails_with_native_injection
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.test.logging_enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.touch_move_tolerance
+  type: AtomicFloat
+  value: 0.1f
+  mirror: always
+
+- name: apz.touch_scroll.buffer_max_age
+  type: int32_t
+  value: 200  # milliseconds
+  mirror: once
+
+- name: apz.touch_start_tolerance
+  type: AtomicFloat
+  value: 0.1f
+  mirror: always
+
+- name: apz.velocity_bias
+  type: AtomicFloat
+  value: 0.0f
+  mirror: always
+
+- name: apz.velocity_relevance_time_ms
+  type: RelaxedAtomicUint32
+  value: 100
+  mirror: always
+
+- name: apz.windows.force_disable_direct_manipulation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: apz.windows.use_direct_manipulation
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.windows.check_for_pan_gesture_conversion
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: apz.x_skate_highmem_adjust
+  type: AtomicFloat
+  value: 0.0f
+  mirror: always
+
+- name: apz.x_skate_size_multiplier
+  type: AtomicFloat
+  value: 1.25f
+  mirror: always
+
+- name: apz.x_stationary_size_multiplier
+  type: AtomicFloat
+  value: 1.5f
+  mirror: always
+
+- name: apz.y_skate_highmem_adjust
+  type: AtomicFloat
+  value: 0.0f
+  mirror: always
+
+- name: apz.y_skate_size_multiplier
+  type: AtomicFloat
+#if defined(MOZ_WIDGET_ANDROID)
+  value: 1.5f
+#else
+  value: 3.5f
+#endif
+  mirror: always
+
+- name: apz.y_stationary_size_multiplier
+  type: AtomicFloat
+#if defined(MOZ_WIDGET_ANDROID)
+  value: 1.5f
+#else
+  value: 3.5f
+#endif
+  mirror: always
+
+- name: apz.zoom_animation_duration_ms
+  type: RelaxedAtomicInt32
+#if defined(MOZ_WIDGET_ANDROID)
+  value: 250
+#else
+  value: 350
+#endif
+  mirror: always
+
+- name: apz.scale_repaint_delay_ms
+  type: RelaxedAtomicInt32
+  value: 500
+  mirror: always
+
+# Whether to use rounded external scroll offsets.
+- name: apz.rounded_external_scroll_offset
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "beacon."
+#---------------------------------------------------------------------------
+
+# Is support for Navigator.sendBeacon enabled?
+- name: beacon.enabled
+  type: bool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "bidi."
+#---------------------------------------------------------------------------
+
+# Whether delete and backspace should immediately delete characters not
+# visually adjacent to the caret, or adjust the visual position of the caret
+# on the first keypress and delete the character on a second keypress
+- name: bidi.edit.delete_immediately
+  type: bool
+  value: true
+  mirror: always
+
+# Bidi caret movement style:
+# 0 = logical
+# 1 = visual
+# 2 = visual, but logical during selection
+- name: bidi.edit.caret_movement_style
+  type: int32_t
+#if !defined(XP_LINUX) && defined(NIGHTLY_BUILD)
+  value: 1
+#else
+  value: 2 # See Bug 1638240
+#endif
+  mirror: always
+
+# Bidi numeral style:
+# 0 = nominalnumeralBidi *
+# 1 = regularcontextnumeralBidi
+# 2 = hindicontextnumeralBidi
+# 3 = arabicnumeralBidi
+# 4 = hindinumeralBidi
+# 5 = persiancontextnumeralBidi
+# 6 = persiannumeralBidi
+- name: bidi.numeral
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Bidi text type
+# 1 = charsettexttypeBidi *
+# 2 = logicaltexttypeBidi
+# 3 = visualtexttypeBidi
+- name: bidi.texttype
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+
+# Bidi direction
+# 1 = directionLTRBidi *
+# 2 = directionRTLBidi
+- name: bidi.direction
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+
+# Setting this pref to |true| forces Bidi UI menu items and keyboard shortcuts
+# to be exposed, and enables the directional caret hook. By default, only
+# expose it for bidi-associated system locales.
+- name: bidi.browser.ui
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "browser."
+#---------------------------------------------------------------------------
+
+- name: browser.active_color
+  type: String
+  value: "#EE0000"
+  mirror: never
+
+- name: browser.active_color.dark
+  type: String
+  value: "#FF6666"
+  mirror: never
+
+- name: browser.anchor_color
+  type: String
+  value: "#0000EE"
+  mirror: never
+
+# If you change this, you probably also want to change
+# nsXPLookAndFeel::GenericDarkColor for MozNativehyperlinktext.
+- name: browser.anchor_color.dark
+  type: String
+  value: "#8C8CFF"
+  mirror: never
+
+# See http://dev.w3.org/html5/spec/forms.html#attr-fe-autofocus
+- name: browser.autofocus
+  type: bool
+  value: true
+  mirror: always
+
+- name: browser.cache.disk.enable
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: browser.cache.memory.enable
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Limit of recent metadata we keep in memory for faster access, in KB.
+- name: browser.cache.disk.metadata_memory_limit
+  type: RelaxedAtomicUint32
+  value: 250   # 0.25 MB
+  mirror: always
+
+# Does the user want smart-sizing?
+- name: browser.cache.disk.smart_size.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Disk cache capacity in kilobytes. It's used only when
+# browser.cache.disk.smart_size.enabled == false
+- name: browser.cache.disk.capacity
+  type: RelaxedAtomicUint32
+  value: 256000
+  mirror: always
+
+# -1 = determine dynamically, 0 = none, n = memory capacity in kilobytes.
+- name: browser.cache.memory.capacity
+  type: RelaxedAtomicInt32
+  value: -1
+  mirror: always
+
+# When smartsizing is disabled we could potentially fill all disk space by
+# cache data when the disk capacity is not set correctly. To avoid that we
+# check the free space every time we write some data to the cache. The free
+# space is checked against two limits. Once the soft limit is reached we start
+# evicting the least useful entries, when we reach the hard limit writing to
+# the entry fails.
+- name: browser.cache.disk.free_space_soft_limit
+  type: RelaxedAtomicUint32
+  value: 5 * 1024   # 5MB
+  mirror: always
+
+- name: browser.cache.disk.free_space_hard_limit
+  type: RelaxedAtomicUint32
+  value: 1024    # 1MB
+  mirror: always
+
+# The number of chunks we preload ahead of read. One chunk currently has
+# 256kB.
+- name: browser.cache.disk.preload_chunk_count
+  type: RelaxedAtomicUint32
+  value: 4    # 1 MB of read ahead
+  mirror: always
+
+# Max-size (in KB) for entries in disk cache. Set to -1 for no limit.
+# (Note: entries bigger than 1/8 of disk-cache are never cached)
+- name: browser.cache.disk.max_entry_size
+  type: RelaxedAtomicUint32
+  value: 50 * 1024    # 50 MB
+  mirror: always
+
+# Max-size (in KB) for entries in memory cache. Set to -1 for no limit.
+# (Note: entries bigger than than 90% of the mem-cache are never cached.)
+- name: browser.cache.memory.max_entry_size
+  type: RelaxedAtomicInt32
+  value: 5 * 1024
+  mirror: always
+
+# Memory limit (in kB) for new cache data not yet written to disk. Writes to
+# the cache are buffered and written to disk on background with low priority.
+# With a slow persistent storage these buffers may grow when data is coming
+# fast from the network. When the amount of unwritten data is exceeded, new
+# writes will simply fail. We have two buckets, one for important data
+# (priority) like html, css, fonts and js, and one for other data like images,
+# video, etc.
+# Note: 0 means no limit.
+- name: browser.cache.disk.max_chunks_memory_usage
+  type: RelaxedAtomicUint32
+  value: 40 * 1024
+  mirror: always
+- name: browser.cache.disk.max_priority_chunks_memory_usage
+  type: RelaxedAtomicUint32
+  value: 40 * 1024
+  mirror: always
+
+
+# Number of seconds the cache spends writing pending data and closing files
+# after shutdown has been signalled. Past that time data is not written and
+# files are left open for the OS to clean up.
+- name: browser.cache.max_shutdown_io_lag
+  type: RelaxedAtomicUint32
+  value: 2
+  mirror: always
+
+# After the max_shutdown_io_lag has passed, we will attempt to cancel
+# blocking IO (on windows). The CacheIOThread may pick up more blocking
+# tasks so we want to cancel those too. The main thread will be woken
+# up every shutdown_io_time_between_cancellations_ms to cancel the IO
+# on the other thread.
+- name: browser.cache.shutdown_io_time_between_cancellations_ms
+  type: RelaxedAtomicUint32
+  value: 5
+  mirror: always
+
+# A percentage limit for media content type in the disk cache. When some entries
+# need to be evicted and media is over the limit, it's evicted first.
+- name: browser.cache.disk.content_type_media_limit
+  type: RelaxedAtomicInt32
+  value: 50
+  mirror: always
+
+# How often to validate document in cache
+#   0 = once-per-session,
+#   1 = each-time,
+#   2 = never,
+#   3 = when-appropriate/automatically
+- name: browser.cache.check_doc_frequency
+  type: RelaxedAtomicUint32
+  value: 3
+  mirror: always
+
+# Compression level for cached JavaScript bytecode
+#   0 = do not compress,
+#   1 = minimal compression,
+#   9 = maximal compression
+- name: browser.cache.jsbc_compression_level
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Whether tooltips are enabled.
+- name: browser.chrome.toolbar_tips
+  type: bool
+  value: true
+  mirror: always
+
+# Whether tooltips are hidden on keydown.
+#  0: never
+#  1: always
+#  2: only on non-modifier keys
+- name: browser.chrome.toolbar_tips.hide_on_keydown
+  type: uint32_t
+#if defined(XP_WIN)
+  value: 0
+#else
+  value: 2
+#endif
+  mirror: always
+
+# DLP agent name, for display in the browser
+- name: browser.contentanalysis.agent_name
+  type: String
+  value: "A DLP agent"
+  mirror: never
+
+# (optional) The organization name that the DLP agent should have. If this is
+# non-empty and the DLP agent is not signed with this organization name,
+# Firefox will fail the connection.
+- name: browser.contentanalysis.client_signature
+  type: String
+  value: ""
+  mirror: never
+
+# Content analysis by external applications, e.g. data-loss prevention apps
+- name: browser.contentanalysis.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# What content analysis should return if there is a problem communicating
+# with the agent. (see DefaultResponse enum in ContentAnalysis.h)
+# Make sure these stay in sync with the out-of-range check in Policies.sys.mjs.
+#
+#   0: Block all requests
+#   1: Warn on all requests (which lets the user decide)
+#   2: Allow all requests
+- name: browser.contentanalysis.default_result
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# Is the IPC pipe to the DLP tool specific to the user or to the system?
+- name: browser.contentanalysis.is_per_user
+  type: bool
+  value: true
+  mirror: always
+
+# Path name of pipe used to connect to a configured DLP agent.
+- name: browser.contentanalysis.pipe_path_name
+  type: String
+  value: "path_user"
+  mirror: never
+
+# Space-separated list of regexs that are compared to URLs of resources
+# being checked by content-analysis.  Resources that match are not checked
+# and are always permitted.
+# By default this does not check any about: page except for about:blank
+# and about:srcdoc.
+- name: browser.contentanalysis.allow_url_regex_list
+  type: String
+  value: "^about:(?!blank|srcdoc).*"
+  mirror: never
+
+# Space-separated list of regexs that are compared to URLs of resources
+# being checked by content-analysis.  Resources that match are not checked
+# and are always denied.
+- name: browser.contentanalysis.deny_url_regex_list
+  type: String
+  value: ""
+  mirror: never
+
+# Should CA ignore the system setting and use silent notifications?
+- name: browser.contentanalysis.silent_notifications
+  type: bool
+  value: false
+  mirror: always
+
+# Time (secs) after which content analysis operations are considered timed-out
+- name: browser.contentanalysis.agent_timeout
+  type: uint32_t
+  value: 30
+  mirror: always
+
+# Should Firefox show a notification or dialog when content analysis blocks
+# access?
+- name: browser.contentanalysis.show_blocked_result
+  type: bool
+  value: true
+  mirror: always
+
+# Should Firefox bypass content analysis for pastes and drags whose source
+# is the same tab?
+- name: browser.contentanalysis.bypass_for_same_tab_operations
+  type: bool
+  value: false
+  mirror: always
+
+# Should Firefox use content analysis for clipboard operations?
+# Note that this has no effect unless browser.contentanalysis.enabled
+# is true.
+- name: browser.contentanalysis.interception_point.clipboard.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Should Firefox use content analysis for drag and drop operations?
+# Note that this has no effect unless browser.contentanalysis.enabled
+# is true.
+- name: browser.contentanalysis.interception_point.drag_and_drop.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Should Firefox use content analysis for file upload operations through
+# a file dialog?
+# Note that this has no effect unless browser.contentanalysis.enabled
+# is true.
+- name: browser.contentanalysis.interception_point.file_upload.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Should Firefox use content analysis for print operations?
+# Note that this has no effect unless browser.contentanalysis.enabled
+# is true.
+- name: browser.contentanalysis.interception_point.print.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Content blocking for Enhanced Tracking Protection
+- name: browser.contentblocking.database.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# How many recent block/unblock actions per origins we remember in the
+# Content Blocking log for each top-level window.
+- name: browser.contentblocking.originlog.length
+  type: uint32_t
+  value: 32
+  mirror: always
+
+# Min font device pixel size at which to turn on high quality.
+- name: browser.display.auto_quality_min_font_size
+  type: RelaxedAtomicUint32
+  value: 20
+  mirror: always
+
+- name: browser.display.background_color
+  type: String
+  value: "#FFFFFF"
+  mirror: never
+
+- name: browser.display.background_color.dark
+  type: String
+  value: "#1C1B22"
+  mirror: never
+
+# This preference is a bit confusing because we use the opposite
+# string value in the colors dialog to indicate to users how FF HCM
+# will behave.
+# With resect to document colors, these values mean:
+# 0 = "default" = always, except in high contrast mode
+# 1 = "always"
+# 2 = "never"
+#
+# On windows, we set this to 0, which means FF HCM will mirror OS HCM.
+# Everywhere else, we set this to 1, disabling FF HCM.
+- name: browser.display.document_color_use
+  type: RelaxedAtomicUint32
+#if defined(XP_WIN)
+  value: 0
+#else
+  value: 1
+#endif
+  mirror: always
+  rust: true
+
+# 0 = always native
+# 1 = never native
+# other = default
+- name: browser.display.windows.non_native_menus
+  type: RelaxedAtomicUint32
+  value: 2
+  mirror: always
+  rust: true
+
+# This pref dictates whether or not backplates and background images
+# are to be drawn, when in high-contrast mode:
+#   false: do not draw backplates or render background images
+#   true: render background images and draw backplates
+# This condition is only considered when high-contrast mode is enabled
+# in Firefox, ie. when the user has:
+#   (1) mUseAccessibilityMode set to true (Widows high-contrast mode is on)
+#       AND browser.display.document_color_use set to 0
+#       (only with high-contrast themes) OR
+#   (2) browser.display.document_color_use set to 2 (always)
+- name: browser.display.permit_backplate
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether we should suppress the background-image of the canvas (the root
+# frame) if we're in forced colors mode.
+#
+# This is important because some sites use background-image with a plain color
+# and it causes undesirable results in high-contrast mode.
+#
+# See bug 1614921 for example.
+- name: browser.display.suppress_canvas_background_image_on_forced_colors
+  type: bool
+  value: true
+  mirror: always
+
+- name: browser.display.foreground_color
+  type: String
+  value: "#000000"
+  mirror: never
+
+- name: browser.display.foreground_color.dark
+  type: String
+  value: "#FBFBFE"
+  mirror: never
+
+# Determines the behavior of OS zoom settings.
+#
+#   0: doesn't affect rendering at all
+#   1: affects full zoom (dpi, effectively).
+#   2: affects text zoom.
+#
+# Default is (1): Historical behavior on Linux, matches other browsers on
+# Windows, and generally creates more consistent rendering.
+- name: browser.display.os-zoom-behavior
+  type: RelaxedAtomicInt32
+  value: 1
+  mirror: always
+  rust: true
+
+# Whether focus rings are always shown by default.
+#
+# This is the initial value of nsWindowRoot::mShowFocusRings, but it can be
+# overridden by system preferences.
+- name: browser.display.show_focus_rings
+  type: bool
+  value: false
+  mirror: always
+
+# Enable showing image placeholders while image is loading or when image is broken.
+- name: browser.display.show_image_placeholders
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we should always enable focus rings after focus was moved by keyboard.
+#
+# This behavior matches both historical and GTK / Windows focus behavior.
+#
+# :focus-visible is intended to provide better heuristics than this.
+- name: browser.display.always_show_rings_after_key_focus
+  type: bool
+  value: false
+  mirror: always
+
+# In theory: 0 = never, 1 = quick, 2 = always, though we always just use it as
+# a bool!
+- name: browser.display.use_document_fonts
+  type: RelaxedAtomicInt32
+  value: 1
+  mirror: always
+  rust: true
+
+# font-family names for which we'll override use_document_fonts=0, and always
+# use the specified font.
+# This is to support ligature-icon fonts, which render literal strings like
+# "arrow_drop_down" with an icon, even when use_document_fonts is disabled.
+# If an author provides & uses such a font, and we decline to use it, we'll end
+# up rendering these literal strings where the author intended an icon, which
+# can cause all sorts of overlapping/unreadable content.
+- name: browser.display.use_document_fonts.icon_font_allowlist
+  type: String
+  value: >-
+    Material Icons,
+    Material Icons Extended,
+    Material Icons Outlined,
+    Material Icons Round,
+    Material Icons Sharp,
+    Material Icons Two Tone,
+    Google Material Icons,
+    Google Material Icons Filled,
+    Material Symbols Outlined,
+    Material Symbols Round,
+    Material Symbols Rounded,
+    Material Symbols Sharp,
+    Google Symbols,
+    FontAwesome
+  mirror: never
+
+- name: browser.display.use_system_colors
+  type: RelaxedAtomicBool
+#ifdef XP_WIN
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: browser.dom.window.dump.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_MOZILLA_OFFICIAL@
+  mirror: always
+
+# See bug 1738574
+- name: browser.download.start_downloads_in_tmp_dir
+  type: bool
+  value: false
+  mirror: always
+
+# See bug 1747343
+- name: browser.download.always_ask_before_handling_new_types
+  type: bool
+  value: false
+  mirror: always
+
+# See bug 1731668
+- name: browser.download.enable_spam_prevention
+  type: bool
+  value: false
+  mirror: always
+
+# See bug 1772569
+- name: browser.download.open_pdf_attachments_inline
+  type: bool
+  value: false
+  mirror: always
+
+# See bug 1811830
+- name: browser.download.force_save_internally_handled_attachments
+  type: bool
+  value: false
+  mirror: always
+
+- name: browser.download.sanitize_non_media_extensions
+  type: bool
+  value: true
+  mirror: always
+
+# Image document's automatic image sizing.
+- name: browser.enable_automatic_image_resizing
+  type: bool
+  value: true
+  mirror: always
+
+# Image document's click-to-resize.
+- name: browser.enable_click_image_resizing
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+- name: browser.find.ignore_ruby_annotations
+  type: bool
+  value: true
+  mirror: always
+
+#if defined(XP_MACOSX)
+# Whether pressing Esc will exit fullscreen.
+- name: browser.fullscreen.exit_on_escape
+  type: bool
+  value: true
+  mirror: always
+#endif
+
+# The max url length we'll store in history.
+#
+# The default value is mostly a guess based on various facts:
+#
+# * IE didn't support urls longer than 2083 chars
+# * Sitemaps protocol used to support a maximum of 2048 chars
+# * Various SEO guides suggest to not go over 2000 chars
+# * Various apps/services are known to have issues over 2000 chars
+# * RFC 2616 - HTTP/1.1 suggests being cautious about depending
+#   on URI lengths above 255 bytes
+#
+- name: browser.history.maxUrlLength
+  type: uint32_t
+  value: 2000
+  mirror: always
+
+# Max size of push/replaceState data parameter
+- name: browser.history.maxStateObjectSize
+  type: int32_t
+  value: 16777216
+  mirror: always
+
+# True to collect wireframes upon navigations / pushState
+- name: browser.history.collectWireframes
+  type: bool
+  value: false
+  mirror: always
+
+# The minimum area for a rect to be included in a wireframe, in CSS pixels.
+#
+# The current value of 50 is pretty arbitrary, and will be tuned as we refine
+# and test the wireframing capability.
+- name: browser.history.wireframeAreaThreshold
+  type: uint32_t
+  value: 50
+  mirror: always
+
+#if defined(XP_WIN) || defined(XP_LINUX)
+  # Notify TabUnloader or send the memory pressure if the memory resource
+  # notification is signaled AND the available commit space is lower than
+  # this value.
+-   name: browser.low_commit_space_threshold_mb
+    type: RelaxedAtomicUint32
+    value: 200
+    mirror: always
+#endif
+
+#ifdef XP_LINUX
+  # On Linux we also check available memory in comparison to total memory,
+  # and use this percent value (out of 100) to determine if we are in a
+  # low memory scenario.
+-   name: browser.low_commit_space_threshold_percent
+    type: RelaxedAtomicUint32
+    value: 5
+    mirror: always
+#endif
+
+# Render animations and videos as a solid color
+- name: browser.measurement.render_anims_and_video_solid
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: browser.navigation.requireUserInteraction
+  type: bool
+  value: true
+  mirror: always
+
+# Indicates if about:newtab shows content (enabled) or just blank.
+- name: browser.newtabpage.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Open PDFs in Edge with the --app flag if it is the default.
+- name: browser.pdf.launchDefaultEdgeAsApp
+  type: bool
+  value: true
+  mirror: always
+
+# Maximium delay between keystrokes that will be considered typing (milliseconds).
+- name: browser.places.interactions.typing_timeout_ms
+  type: RelaxedAtomicUint32
+  value: 3000
+  mirror: always
+
+# Maximum delay between scroll input events that will be considered a scrolling interaction (milliseconds).
+- name: browser.places.interactions.scrolling_timeout_ms
+  type: RelaxedAtomicUint32
+  value: 5000
+  mirror: always
+
+# Number of seconds till the sponsored session is timeout.
+- name: browser.places.sponsoredSession.timeoutSecs
+  type: RelaxedAtomicUint32
+  value: 3600
+  mirror: always
+
+# Whether to start the private browsing mode at application startup
+- name: browser.privatebrowsing.autostart
+  type: bool
+  value: false
+  mirror: always
+
+# Force usage of in-memory (rather than file on disk) media cache for video streaming when private browsing
+- name: browser.privatebrowsing.forceMediaMemoryCache
+  type: bool
+  value: false
+  mirror: always
+
+# Communicates the toolbar color to platform (for e.g., prefers-color-scheme).
+#
+# Returns whether the toolbar is dark (0), light (1), or system (2). The
+# theming code overrides it if appropriate.
+- name: browser.theme.toolbar-theme
+  type: RelaxedAtomicUint32
+  value: 2
+  mirror: always
+
+# Communicates the preferred content theme color to platform (for e.g.,
+# prefers-color-scheme).
+#
+# dark (0), light (1), system (2), or toolbar (3).
+#
+# Default to "toolbar", the theming code sets it appropriately.
+- name: browser.theme.content-theme
+  type: RelaxedAtomicUint32
+  value: 2
+  mirror: always
+  rust: true
+
+# Whether the firefox titlebar respects the
+# -moz-windows-accent-color-in-titlebar setting on the tab strip.
+- name: browser.theme.windows.accent-color-in-tabs.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Blocked plugin content
+- name: browser.safebrowsing.blockedURIs.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Malware protection
+- name: browser.safebrowsing.malware.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Phishing protection
+- name: browser.safebrowsing.phishing.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Maximum size for an array to store the safebrowsing prefixset.
+- name: browser.safebrowsing.prefixset_max_array_size
+  type: RelaxedAtomicUint32
+  value: 512*1024
+  mirror: always
+
+# SessionStore prefs
+# Maximum number of bytes of DOMSessionStorage data we collect per origin.
+- name: browser.sessionstore.dom_storage_limit
+  type: uint32_t
+  value: 2048
+  mirror: always
+
+# Maximum number of characters of form field data per field we collect.
+- name: browser.sessionstore.dom_form_limit
+  type: uint32_t
+  value: 1024*1024*2
+  mirror: always
+
+# Maximum number of characters of form data we collect per origin.
+- name: browser.sessionstore.dom_form_max_limit
+  type: uint32_t
+  value: 1024*1024*50
+  mirror: always
+
+# Minimal interval between two save operations in milliseconds (while the user is active).
+- name: browser.sessionstore.interval
+  type: RelaxedAtomicUint32
+  value: 15000
+  mirror: always
+
+# Disable collection of data for session store using the native collector code,
+# instead use the older implementation that's not compatible with session
+# history in the parent (and thus Fission).
+- name: browser.sessionstore.disable_platform_collection
+  type: bool
+#if defined(MOZ_THUNDERBIRD)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+  do_not_use_directly: true
+
+#if defined(NIGHTLY_BUILD) || defined(MOZ_DEV_EDITION) || defined(DEBUG)
+- name: browser.startup.record
+  type: bool
+  value: false
+  mirror: always
+#endif
+
+# Causes SessionStore to ignore non-final update messages from
+# browser tabs that were not caused by a flush from the parent.
+# This is a testing flag and should not be used by end-users.
+- name: browser.sessionstore.debug.no_auto_updates
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If set, when a link is opened to a new tab, do not switch to the new tab.
+#
+# This pref is used when the link is opened with "Open Link in New Tab",
+# middle-click, etc.
+#
+# See also browser.tabs.loadDivertedInBackground, which is used when the website
+# diverts the link into a new tab.
+- name: browser.tabs.loadInBackground
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we should draw the tabs on top of the titlebar.
+#
+# no (0), yes (1), or default (2), which is true everywhere except Linux.
+- name: browser.tabs.inTitlebar
+  type: int32_t
+  value: 2
+  mirror: always
+
+# If set, use DocumentChannel to directly initiate loads entirely
+# from parent-process BrowsingContexts
+- name: browser.tabs.documentchannel.parent-controlled
+  type: bool
+  value: false
+  mirror: always
+
+# If set, middle clicking on a link opens the link in a new tab.
+- name: browser.tabs.opentabfor.middleclick
+  type: bool
+  value: true
+  mirror: always
+
+# Testing-only pref which makes data: URIs be loaded in a "web" content process
+# instead of within a process based on the URI's loader.
+- name: browser.tabs.remote.dataUriInDefaultWebProcess
+  type: bool
+  value: false
+  mirror: always
+
+# Testing-only pref to force system-triggered about:blank loads to not change
+# content processes. This is used for performance tests which load an
+# about:blank document between navigations for historical reasons to avoid
+# unnecessary process switches.
+- name: browser.tabs.remote.systemTriggeredAboutBlankAnywhere
+  type: bool
+  value: false
+  mirror: always
+
+# Testing-only pref to cause PBrowser creation for a specific BrowsingContext to
+# fail, to test the errored codepath.
+- name: browser.tabs.remote.testOnly.failPBrowserCreation.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: browser.tabs.remote.force-paint
+  type: bool
+  value: true
+  mirror: always
+
+# When this pref is enabled document loads with a mismatched
+# Cross-Origin-Embedder-Policy header will fail to load
+- name: browser.tabs.remote.useCrossOriginEmbedderPolicy
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# This pref makes `credentialless` a valid value for
+# Cross-Origin-Embedder-Policy header
+- name: browser.tabs.remote.coep.credentialless
+  type: RelaxedAtomicBool
+#if defined(ANDROID)
+  value: @IS_NIGHTLY_BUILD@
+#else
+  value: true
+#endif
+  mirror: always
+  do_not_use_directly: true
+
+# When this pref is enabled top level loads with a mismatched
+# Cross-Origin-Opener-Policy header will be loaded in a separate process.
+- name: browser.tabs.remote.useCrossOriginOpenerPolicy
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# When this pref is enabled then we use a separate content process for
+# top-level load of file:// URIs
+- name: browser.tabs.remote.separateFileUriProcess
+  type: RelaxedAtomicBool
+#if !defined(ANDROID)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Pref to control whether we use a separate privileged content process
+# for certain mozilla webpages (which are listed in the pref
+# browser.tabs.remote.separatedMozillaDomains).
+- name: browser.tabs.remote.separatePrivilegedMozillaWebContentProcess
+  type: bool
+  value: false
+  mirror: always
+
+# Whether or not process selection for subframes will prefer re-using an
+# existing content process over creating a new one. Enabling this pref should
+# reduce the number of processes allocated for non-first-party domains if
+# dom.ipc.processCount.webIsolated > 1.
+- name: browser.tabs.remote.subframesPreferUsed
+  type: bool
+  value: true
+  mirror: always
+
+# When this pref is enabled, opaque response is only allowed to enter the
+# content process if it's a response for media (audio, image, video), CSS, or
+# JavaScript.
+- name: browser.opaqueResponseBlocking
+  type: RelaxedAtomicBool
+#if defined(ANDROID)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# When this pref is enabled, the JS validator will be enabled for
+# ORB.
+- name: browser.opaqueResponseBlocking.javascriptValidator
+  type: bool
+  value: true
+  mirror: always
+
+# This pref controls how filtering of opaque responses for calls to `Window.fetch`.
+# (and similar) is performed in the parent process. This is intended to make sure
+# that data that would be filtered in a content process never actually reaches that
+# content process.
+# See https://fetch.spec.whatwg.org/#concept-filtered-response-opaque
+#   0) Don't filter in the parent process at all, and let content processes handle
+#      opaque filtering. Regardless of if ORB is enabled or not. N.B. that if ORB
+#      is enabled opaque responses will be blocked.
+#   1) If ORB is enabled, in the parent process, filter the responses that ORB allows.
+#      N.B. any responses ORB doesn't allow will not send data to a content process
+#      since they will return a NetworkError. If the request is allowed by ORB, the
+#      internal response will be intact and sent to the content process as is.
+#   2) If ORB is enabled, in the parent process, filter the responses that ORB blocks,
+#      when they were issued by `Window.fetch` (and similar).
+#   3) Filter all responses in the parent, regardless of if ORB is enabled or not.
+#      This means that opaque responses coming from `Window.fetch` won't even be
+#      considered for being blocked by ORB.
+- name: browser.opaqueResponseBlocking.filterFetchResponse
+  type: uint32_t
+  value: 2
+  mirror: always
+  do_not_use_directly: true
+
+# This pref controls how exceptions to opaque response blocking for the media MIME types
+# `audio/*` and `video/*` are handled. This is because step 8 in the spec that performs
+# audio or video type pattern matching cannot handle certain MIME types (yet).
+# See https://whatpr.org/fetch/1442.html#orb-algorithm
+#   0) No exceptions
+#   1) Some exceptions, explicitly hard coded in `IsOpaqueSafeListedSpecBreakingMIMEType`
+#   2) Allow all MIME types beginning with `audio/*` or `video/*`.
+- name: browser.opaqueResponseBlocking.mediaExceptionsStrategy
+  type: uint32_t
+  value: 1
+  mirror: always
+  do_not_use_directly: true
+
+# When true, zooming will be enabled on all sites, even ones that declare
+# user-scalable=no or use touch-action to disable pinch gestures.
+- name: browser.ui.zoom.force-user-scalable
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: browser.viewport.desktopWidth
+  type: RelaxedAtomicInt32
+  value: 980
+  mirror: always
+
+- name: browser.visited_color
+  type: String
+  value: "#551A8B"
+  mirror: never
+
+# If you change this, you probably also want to change
+# nsXPLookAndFeel::GenericDarkColor for MozNativevisitedhyperlinktext.
+- name: browser.visited_color.dark
+  type: String
+  value: "#FFADFF"
+  mirror: never
+
+# When true, soft reloads (including location.reload())
+# will only froce validate the top level document, subresources will
+# be loaded normally as-if users normally navigated to the page.
+- name: browser.soft_reload.only_force_validate_top_level_document
+  type: bool
+  value: true
+  mirror: always
+
+# Whether or not to save and restore zoom levels on a per-site basis.
+- name: browser.zoom.siteSpecific
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# Whether we block opening pickers from background tabs.
+- name: browser.disable_pickers_background_tabs
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "channelclassifier."
+#---------------------------------------------------------------------------
+
+- name: channelclassifier.allowlist_example
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "clipboard."
+#---------------------------------------------------------------------------
+
+# Clipboard behavior.
+- name: clipboard.autocopy
+  type: bool
+#if !defined(ANDROID) && !defined(XP_MACOSX) && defined(XP_UNIX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+#ifdef XP_WIN
+  # allow to copy clipboard data to Clipboard History/Cloud
+  # (used on sensitive data in about:logins and Private Browsing)
+-   name: clipboard.copyPrivateDataToClipboardCloudOrHistory
+    type: bool
+    value: false
+    mirror: always
+
+  # Whether to put a file promise onto the clipboard when copying images on Windows
+-   name: clipboard.imageAsFile.enabled
+    type: bool
+    value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+    mirror: always
+#endif
+
+#---------------------------------------------------------------------------
+# Prefs starting with "consoleservice."
+#---------------------------------------------------------------------------
+
+#if defined(ANDROID)
+  # Disable sending console to logcat on release builds.
+-   name: consoleservice.logcat
+    type: RelaxedAtomicBool
+    value: @IS_NOT_RELEASE_OR_BETA@
+    mirror: always
+#endif
+
+#---------------------------------------------------------------------------
+# Prefs starting with "content."
+#---------------------------------------------------------------------------
+
+- name: content.cors.disable
+  type: bool
+  value: false
+  mirror: always
+
+# Back off timer notification after count.
+# -1 means never.
+- name: content.notify.backoffcount
+  type: int32_t
+  value: -1
+  mirror: always
+
+# Notification interval in microseconds.
+# The notification interval has a dramatic effect on how long it takes to
+# initially display content for slow connections. The current value
+# provides good incremental display of content without causing an increase
+# in page load time. If this value is set below 1/10 of a second it starts
+# to impact page load performance.
+# See bugzilla bug 72138 for more info.
+- name: content.notify.interval
+  type: int32_t
+  value: 120000
+  mirror: always
+
+# Do we notify based on time?
+- name: content.notify.ontimer
+  type: bool
+  value: true
+  mirror: always
+
+# How many times to deflect in interactive mode.
+- name: content.sink.interactive_deflect_count
+  type: int32_t
+  value: 0
+  mirror: always
+
+# How many times to deflect in perf mode.
+- name: content.sink.perf_deflect_count
+  type: int32_t
+  value: 200
+  mirror: always
+
+# Parse mode for handling pending events.
+# 0 = don't check for pending events
+# 1 = don't deflect if there are pending events
+# 2 = bail if there are pending events
+- name: content.sink.pending_event_mode
+  type: int32_t
+#ifdef XP_WIN
+  value: 1
+#else
+  value: 0
+#endif
+  mirror: always
+
+# How often to probe for pending events. 1 = every token.
+- name: content.sink.event_probe_rate
+  type: int32_t
+  value: 1
+  mirror: always
+
+# How long to stay off the event loop in interactive mode (microseconds).
+- name: content.sink.interactive_parse_time
+  type: int32_t
+  value: 3000
+  mirror: always
+
+# How long to stay off the event loop in perf mode.
+- name: content.sink.perf_parse_time
+  type: int32_t
+  value: 30000
+  mirror: always
+
+#  How long to be in interactive mode after an event.
+- name: content.sink.interactive_time
+  type: uint32_t
+  value: 750000
+  mirror: always
+
+# How long to stay in perf mode after initial loading.
+- name: content.sink.initial_perf_time
+  type: uint32_t
+  value: 2000000
+  mirror: always
+
+# Should we switch between perf-mode and interactive-mode?
+# 0 = Switch
+# 1 = Interactive mode
+# 2 = Perf mode
+- name: content.sink.enable_perf_mode
+  type: int32_t
+  value: 0
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "converter."
+#---------------------------------------------------------------------------
+
+# Whether we include ruby annotation in the text despite whether it
+# is requested. This was true because we didn't explicitly strip out
+# annotations. Set false by default to provide a better behavior, but
+# we want to be able to pref-off it if user doesn't like it.
+- name: converter.html2txt.always_include_ruby
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "cookiebanners."
+#---------------------------------------------------------------------------
+
+# Controls the cookie banner handling mode in normal browsing.
+# 0: Disables all cookie banner handling.
+# 1: Reject-all if possible, otherwise do nothing.
+# 2: Reject-all if possible, otherwise accept-all.
+- name: cookiebanners.service.mode
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# When set to true, cookie banners are detected and detection events are
+# dispatched, but they will not be handled. Requires the service to be enabled
+# for the desired mode via pref cookiebanners.service.mode*
+- name: cookiebanners.service.detectOnly
+  type: bool
+  value: false
+  mirror: always
+
+# Controls the cookie banner handling mode in private browsing. Same mode
+# options as the normal browsing pref above.
+- name: cookiebanners.service.mode.privateBrowsing
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# Enables use of global CookieBannerRules, which apply to all sites. This is
+# used for click rules that can handle common Consent Management Providers
+# (CMP).
+# Enabling this (when the cookie handling feature is enabled) may negatively
+# impact site performance since it requires us to run rule-defined query
+# selectors for every page.
+- name: cookiebanners.service.enableGlobalRules
+  type: bool
+  value: true
+  mirror: always
+
+# Whether global rules are allowed to run in sub-frames. Running query selectors
+# in every sub-frame may negatively impact performance, but is required for some
+# CMPs.
+- name: cookiebanners.service.enableGlobalRules.subFrames
+  type: bool
+  value: true
+  mirror: always
+
+# Enables the cookie banner cookie injector. The cookie banner cookie injector
+# depends on the `cookiebanners.service.mode` pref above.
+- name: cookiebanners.cookieInjector.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# By default, how many seconds in the future cookies should expire after they
+# have been injected. Defaults to 12 months. Individual cookie rules may
+# override this.
+- name: cookiebanners.cookieInjector.defaultExpiryRelative
+  type: uint32_t
+  value: 31536000
+  mirror: always
+
+# How many times per site and site load to check for cookie banners after which
+# the mechanism is considered on cooldown for the site in the current browsing
+# session. If the threshold is set to zero, banner clicking won't be considered
+# as being on cooldown regardless of how many times the site is loaded. The
+# maximum value for the retry is 255, any value over than that will be capped.
+- name: cookiebanners.bannerClicking.maxTriesPerSiteAndSession
+  type: uint32_t
+  value: 3
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "datareporting."
+#---------------------------------------------------------------------------
+
+# Do note that the toggle on Fenix and Focus does NOT reflect to this pref.
+- name: datareporting.healthreport.uploadEnabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+#---------------------------------------------------------------------------
+# Prefs starting with "device."
+#---------------------------------------------------------------------------
+
+# Is support for the device sensors API enabled?
+- name: device.sensors.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# KaiOS-only, see https://bugzilla.mozilla.org/show_bug.cgi?id=1699707#c10
+- name: device.sensors.ambientLight.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: device.sensors.motion.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: device.sensors.orientation.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# KaiOS-only, see https://bugzilla.mozilla.org/show_bug.cgi?id=1699707#c10
+- name: device.sensors.proximity.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: device.sensors.test.events
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "devtools."
+#---------------------------------------------------------------------------
+
+- name: devtools.console.stdout.chrome
+  type: RelaxedAtomicBool
+  value: @IS_NOT_MOZILLA_OFFICIAL@
+  mirror: always
+
+- name: devtools.console.stdout.content
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "docshell."
+#---------------------------------------------------------------------------
+
+# Used to indicate whether session history listeners should be notified
+# about content viewer eviction. Used only for testing.
+- name: docshell.shistory.testing.bfevict
+  type: bool
+  value: false
+  mirror: always
+
+# If true, pages with an opener won't be bfcached.
+- name: docshell.shistory.bfcache.require_no_opener
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# If true, page with beforeunload or unload event listeners can be bfcached.
+- name: docshell.shistory.bfcache.allow_unload_listeners
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# If true, page with beforeunload event listeners can be bfcached.
+# This only works when sessionHistoryInParent is enabled.
+- name: docshell.shistory.bfcache.ship_allow_beforeunload_listeners
+  type: bool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "dom."
+#---------------------------------------------------------------------------
+
+# Allow cut/copy
+- name: dom.allow_cut_copy
+  type: bool
+  value: true
+  mirror: always
+
+# Checks if offscreen animation throttling is enabled.
+- name: dom.animations.offscreen-throttling
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for Navigator.getBattery enabled?
+- name: dom.battery.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Block multiple external protocol URLs in iframes per single event.
+- name: dom.block_external_protocol_in_iframes
+  type: bool
+  value: true
+  mirror: always
+
+# Without this my windows build crashes
+- name: "dom.block_multiple_popups"
+  type: bool
+  value: true
+  mirror: always
+
+# Block sandboxed BrowsingContexts from navigating to external protocols.
+- name: dom.block_external_protocol_navigation_from_sandbox
+  type: bool
+  value: true
+  mirror: always
+
+# Block Insecure downloads from Secure Origins
+- name: dom.block_download_insecure
+  type: bool
+  value: true
+  mirror: always
+
+# The maximum number of popup that is allowed to be opened. Set to -1 for no
+# limit.
+- name: dom.popup_maximum
+  type: int32_t
+  value: -1
+  mirror: always
+
+# Enable experimental popup blocker changes.
+- name: dom.popup.experimental
+  type: bool
+  value: true
+  mirror: always
+
+  # Enable CacheAPI in private browsing mode with encryption
+- name: dom.cache.privateBrowsing.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Exposes window.caches and skips SecureContext check.
+# dom.serviceWorkers.testing.enabled also includes the same effect.
+- name: dom.caches.testing.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# A pref that is used to slow down database initialization for testing purposes.
+- name: dom.cache.databaseInitialization.pauseOnIOThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Disable capture attribute for input elements; only supported on GeckoView.
+- name: dom.capture.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# HTML specification says the level should be 5
+# https://html.spec.whatwg.org/#timer-initialisation-steps
+- name: dom.clamp.timeout.nesting.level
+  type: uint32_t
+  value: 5
+  mirror: once
+
+# Skip the security checks for document.cookie.
+- name: dom.cookie.testing.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# https://whatpr.org/html/10168/interaction.html#closewatcher
+- name: dom.closewatcher.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Disable custom highlight API; implementation pending.
+- name: dom.customHighlightAPI.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+  rust: true
+
+# Allow control characters appear in composition string.
+# When this is false, control characters except
+# CHARACTER TABULATION (horizontal tab) are removed from
+# both composition string and data attribute of compositionupdate
+# and compositionend events.
+- name: dom.compositionevent.allow_control_characters
+  type: bool
+  value: false
+  mirror: always
+
+# Compression Streams (CompressionStream/DecompressionStream)
+- name: dom.compression_streams.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Disable cookie-store API
+- name: dom.cookieStore.enabled
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# Is support for CSSPseudoElement enabled?
+- name: dom.css_pseudo_element.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# After how many seconds we allow external protocol URLs in iframe when not in
+# single events
+- name: dom.delay.block_external_protocol_in_iframes
+  type: uint32_t
+  value: 10   # in seconds
+  mirror: always
+
+# Whether the above pref has any effect at all.
+# Make sure cases like bug 1795380 work before trying to turn this off. See
+# bug 1680721 for some other context that might be relevant.
+- name: dom.delay.block_external_protocol_in_iframes.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.details_group.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Only propagate the open window click permission if the setTimeout() is equal
+# to or less than this value.
+- name: dom.disable_open_click_delay
+  type: int32_t
+  value: 1000
+  mirror: always
+
+- name: dom.disable_open_during_load
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.disable_beforeunload
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.require_user_interaction_for_beforeunload
+  type: bool
+  value: true
+  mirror: always
+
+# Enable/disable Gecko specific edit commands
+- name: dom.document.edit_command.contentReadOnly.enabled
+  type: bool
+  value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+- name: dom.document.edit_command.insertBrOnReturn.enabled
+  type: bool
+  value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# Only intended for fuzzing purposes, this will break mozPrintCallback, etc.
+- name: dom.window_print.fuzzing.block_while_printing
+  type: bool
+  value: false
+  mirror: always
+
+# Enable/disable contenteditable="plaintext-only".
+- name: dom.element.contenteditable.plaintext-only.enabled
+  type: bool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# Whether Dialog elements emit beforetoggle and toggle events during opening and closing.
+# See https://github.com/whatwg/html/pull/10091
+- name: dom.element.dialog.toggle_events.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.element.transform-getters.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the blocking attribute implementation is enabled,
+# see https://html.spec.whatwg.org/#blocking-attributes
+- name: dom.element.blocking.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether CustomStateSet is enabled
+- name: dom.element.customstateset.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether the invoketarget attribute implementation is enabled
+- name: dom.element.invokers.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.mouse_capture.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for Performance.mozMemory enabled?
+- name: dom.enable_memory_stats
+  type: bool
+  value: false
+  mirror: always
+
+# Enable Performance API
+# Whether nonzero values can be returned from performance.timing.*
+- name: dom.enable_performance
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enable Performance Observer API
+- name: dom.enable_performance_observer
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether resource timing will be gathered and returned by performance.GetEntries*
+- name: dom.enable_resource_timing
+  type: bool
+  value: true
+  mirror: always
+
+# Whether event timing will be gathered and returned by performance observer*
+- name: dom.enable_event_timing
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether the LargestContentfulPaint API will be gathered and returned by performance observer*
+- name: dom.enable_largest_contentful_paint
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether performance.GetEntries* will contain an entry for the active document
+- name: dom.enable_performance_navigation_timing
+  type: bool
+  value: true
+  mirror: always
+
+# Whether the scheduler interface will be exposed
+- name: dom.enable_web_task_scheduling
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If this is true, it's allowed to fire "cut", "copy" and "paste" events.
+# Additionally, "input" events may expose clipboard content when inputType
+# is "insertFromPaste" or something.
+- name: dom.event.clipboardevents.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether Shift+Right click force-opens the context menu
+- name: dom.event.contextmenu.shift_suppresses_event
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.event.dragexit.enabled
+  type: bool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
+# If this pref is set to true, typing a surrogate pair causes one `keypress`
+# event whose `charCode` stores the unicode code point over 0xFFFF.  This is
+# compatible with Safari and Chrome in non-Windows platforms.
+# Otherwise, typing a surrogate pair causes two `keypress` events.  This is
+# compatible with legacy web apps which does
+# `String.fromCharCode(event.charCode)`.
+- name: dom.event.keypress.dispatch_once_per_surrogate_pair
+  type: bool
+  value: false
+  mirror: always
+
+# This is meaningful only when `dispatch_once_per_surrogate_pair` is false.
+# If this pref is set to true, `.key` of the first `keypress` is set to the
+# high-surrogate and `.key` of the other is set to the low-surrogate.
+# Therefore, setting this exposing ill-formed UTF-16 string with `.key`.
+# (And also `InputEvent.data` if pressed in an editable element.)
+# Otherwise, `.key` of the first `keypress` is set to the surrogate pair, and
+# `.key` of the second `keypress` is set to the empty string.
+- name: dom.event.keypress.key.allow_lone_surrogate
+  type: bool
+  value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# Whether the result of screenX, screenY, clientX, clientY, offsetX, offsetY,
+# x and y of trusted MouseEvent and subclasses may be fractional values.
+# Enabling this may cause backward compatibility issues.
+# Note that this pref is referred only when
+# `dom.event.pointer.fractional_coordinates.enabled` is `true`.
+- name: dom.event.mouse.fractional_coordinates.trusted.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the result of screenX, screenY, clientX, clientY, offsetX, offsetY,
+# x and y of untrusted MouseEvent and subclasses may be fractional values.
+# I.e., this allows web apps to use fractional values with their own DOM events
+# which have MouseEvent interface.  However, this might cause backward
+# compatibility issues if web apps initializes untrusted events with quotients.
+# Note that this pref is referred only when
+# `dom.event.pointer.fractional_coordinates.enabled` is `true`.
+- name: dom.event.mouse.fractional_coordinates.untrusted.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the result of screenX, screenY, clientX, clientY, offsetX, offsetY,
+# x and y of PointerEvent may be fractional values (except `click`, `auxclick`
+# and `contextmenu`)
+- name: dom.event.pointer.fractional_coordinates.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether wheel event target's should be grouped. When enabled, all wheel
+# events that occur in a given wheel transaction have the same event target.
+- name: dom.event.wheel-event-groups.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether WheelEvent should return pixels instead of lines for
+# WheelEvent.deltaX/Y/Z, when deltaMode hasn't been checked.
+#
+# Other browsers don't use line deltas and websites forget to check for it, see
+# bug 1392460.
+- name: dom.event.wheel-deltaMode-lines.disabled
+  type: bool
+  value: true
+  mirror: always
+
+# Mostly for debugging. Whether we should do the same as
+# dom.event.wheel-deltaMode-lines.disabled, but unconditionally rather than
+# only when deltaMode hasn't been checked.
+- name: dom.event.wheel-deltaMode-lines.always-disabled
+  type: bool
+  value: false
+  mirror: always
+
+# A blocklist (list of domains) for the
+# dom.event.wheel-deltaMode-lines.disabled behavior, in case potential
+# unforeseen problems with it arrive.
+- name: dom.event.wheel-deltaMode-lines.always-enabled
+  type: String
+  value: ""
+  mirror: never
+
+#if defined(XP_MACOSX)
+# Whether to disable treating ctrl click as right click
+- name: dom.event.treat_ctrl_click_as_right_click.disabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+#endif
+
+# Whether Gecko keeps store or forgets the last deepest "enter" event target for
+# the next "enter" or "leave" event dispatching when the last "over" event
+# target is removed from the DOM tree.
+- name: dom.events.mouse-pointer-boundary.keep-enter-targets-after-over-target-removed
+  type: bool
+  value: true
+  mirror: always
+
+# Whether .offset{X,Y} for events targeted at SVG nodes returns bounds relative
+# to the outer SVG.
+- name: dom.events.offset-in-svg-relative-to-svg-root
+  type: bool
+  value: true
+  mirror: always
+
+# Control whether clipboard.read(), clipboard.write() and ClipboardItem are exposed
+# to content.
+- name: dom.events.asyncClipboard.clipboardItem
+  type: bool
+  value: true
+  mirror: always
+
+# Skips checking permission and user activation when accessing the clipboard.
+# Should only be enabled in tests.
+# Access with Clipboard::IsTestingPrefEnabled().
+- name: dom.events.testing.asyncClipboard
+  type: bool
+  value: false
+  mirror: always
+  do_not_use_directly: true
+
+# Control whether `navigator.clipboard.readText()` is exposed to content.
+- name: dom.events.asyncClipboard.readText
+  type: bool
+  value: true
+  mirror: always
+  do_not_use_directly: true
+
+# This pref controls whether or not the `protected` dataTransfer state is
+# enabled. If the `protected` dataTransfer stae is disabled, then the
+# DataTransfer will be read-only whenever it should be protected, and will not
+# be disconnected after a drag event is completed.
+- name: dom.events.dataTransfer.protected.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to hide normal files (i.e. non-images) in dataTransfer inside
+# the content process.
+- name: dom.events.dataTransfer.mozFile.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.events.dataTransfer.imageAsFile.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# User interaction timer interval, in ms
+- name: dom.events.user_interaction_interval
+  type: uint32_t
+  value: 5000
+  mirror: always
+
+# Whether to try to compress touchmove events on IPC layer.
+- name: dom.events.compress.touchmove
+  type: bool
+  value: true
+  mirror: always
+
+# In addition to the above IPC layer compresison, allow touchmove
+# events to be further coalesced in the child side after they
+# are sent.
+- name: dom.events.coalesce.touchmove
+  type: bool
+  value: true
+  mirror: always
+
+# Allow mousemove events to be coalesced in the child side after they are sent.
+- name: dom.events.coalesce.mousemove
+  type: bool
+  value: true
+  mirror: always
+
+# Expose Window.TextEvent and make the builtin editors dispatch `textInput`
+# event as a default action of `beforeinput`.
+- name: dom.events.textevent.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to expose test interfaces of various sorts
+- name: dom.expose_test_interfaces
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.fetchKeepalive.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The maximum number of pending fetch keepalive requests per browser instance
+- name: dom.fetchKeepalive.total_request_limit
+  type: RelaxedAtomicUint32
+  value: 500
+  mirror: always
+
+# The maximum number of pending fetch keepalive requests per origin
+- name: dom.fetchKeepalive.request_limit_per_origin
+  type: RelaxedAtomicUint32
+  value: 250
+  mirror: always
+
+- name: dom.fetchObserver.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to set the incremental flag on the top level document's
+# priority header
+- name: dom.document_priority.incremental
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Allow the content process to create a File from a path. This is allowed just
+# on parent process, on 'file' Content process, or for testing.
+- name: dom.file.createInChild
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Support @autocomplete values for form autofill feature.
+- name: dom.forms.autocomplete.formautofill
+  type: bool
+  value: false
+  mirror: always
+
+# Is support for HTMLElement.autocorrect enabled?
+- name: dom.forms.autocorrect
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Only trusted submit event could trigger form submission.
+- name: dom.forms.submit.trusted_event_only
+  type: bool
+  value: false
+  mirror: always
+
+# This pref just controls whether we format the number with grouping separator
+# characters when the internal value is set or updated. It does not stop the
+# user from typing in a number and using grouping separators.
+- name: dom.forms.number.grouping
+  type: bool
+  value: false
+  mirror: always
+
+# The interval in milliseconds between two Escape key events where the second
+# key event will exit fullscreen, even if it is consumed.
+- name: dom.fullscreen.force_exit_on_multiple_escape_interval
+  type: uint32_t
+  value: 500
+  mirror: always
+
+# Whether the Gamepad API is enabled
+- name: dom.gamepad.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is Gamepad Extension API enabled?
+- name: dom.gamepad.extensions.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is LightIndicator API enabled in Gamepad Extension API?
+- name: dom.gamepad.extensions.lightindicator
+  type: bool
+  value: false
+  mirror: always
+
+# Is MultiTouch API enabled in Gamepad Extension API?
+- name: dom.gamepad.extensions.multitouch
+  type: bool
+  value: false
+  mirror: always
+
+# Is Gamepad vibrate haptic feedback function enabled?
+- name: dom.gamepad.haptic_feedback.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.gamepad.non_standard_events.enabled
+  type: bool
+  value: @IS_NOT_RELEASE_OR_BETA@
+  mirror: always
+
+- name: dom.gamepad.test.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# W3C draft ImageCapture API
+- name: dom.imagecapture.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# The root margin for image lazy loading, defined as four (value, percentage)
+# pairs.
+- name: dom.image-lazy-loading.root-margin.top
+  type: float
+  value: 600
+  mirror: always
+
+- name: dom.image-lazy-loading.root-margin.top.percentage
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.image-lazy-loading.root-margin.bottom
+  type: float
+  value: 600
+  mirror: always
+
+- name: dom.image-lazy-loading.root-margin.bottom.percentage
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.image-lazy-loading.root-margin.left
+  type: float
+  value: 600
+  mirror: always
+
+- name: dom.image-lazy-loading.root-margin.left.percentage
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.image-lazy-loading.root-margin.right
+  type: float
+  value: 600
+  mirror: always
+
+- name: dom.image-lazy-loading.root-margin.right.percentage
+  type: bool
+  value: false
+  mirror: always
+
+# Enable indexedDB in private browsing mode with encryption
+- name: dom.indexedDB.privateBrowsing.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# A pref that is used to slow down connection idle maintenance for testing
+# purposes.
+- name: dom.indexedDB.connectionIdleMaintenance.pauseOnConnectionThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Whether or not indexedDB test mode is enabled.
+- name: dom.indexedDB.testing
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether or not indexedDB experimental features are enabled.
+- name: dom.indexedDB.experimental
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether or not indexedDB preprocessing is enabled.
+- name: dom.indexedDB.preprocessing
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# A pref that is used to slow down database initialization for testing purposes.
+- name: dom.indexedDB.databaseInitialization.pauseOnIOThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# How innerWidth / innerHeight return rounded or fractional sizes.
+#
+#   0 or others: Do not round at all.
+#   1: Round.
+#   2: Truncate.
+#
+# NOTE(emilio): Fractional sizes are not web-compatible, see the regressions
+# from bug 1676843, but we want to expose the fractional sizes (probably in
+# another API) one way or another, see [1], so we're keeping the code for the
+# time being.
+#
+# [1]: https://github.com/w3c/csswg-drafts/issues/5260
+- name: dom.innerSize.rounding
+  type: uint32_t
+  value: 1
+  mirror: always
+
+# Whether we conform to Input Events Level 1 or Input Events Level 2.
+# true:  conforming to Level 1
+# false: conforming to Level 2
+- name: dom.input_events.conform_to_level_1
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we allow BrowsingContextGroup to suspend input events
+- name: dom.input_events.canSuspendInBCG.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# The minimum number of ticks after page navigation
+# that need to occur before user input events are allowed to be handled.
+- name: dom.input_events.security.minNumTicks
+  type: uint32_t
+  value: 3
+  mirror: always
+
+# The minimum elapsed time (in milliseconds) after page navigation
+# for user input events are allowed to be handled.
+- name: dom.input_events.security.minTimeElapsedInMS
+  type: uint32_t
+  value: 100
+  mirror: always
+
+# By default user input handling delay is disabled (mostly) for testing ,
+# this is used for forcefully enable it for certain tests.
+- name: dom.input_events.security.isUserInputHandlingDelayTest
+  type: bool
+  value: false
+  mirror: always
+
+# The maximum time (milliseconds) we reserve for handling input events in each
+# frame.
+- name: dom.input_event_queue.duration.max
+  type: uint32_t
+  value: 8
+  mirror: always
+
+- name: dom.interactive_widget_default_resizes_visual
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# How often to check for CPOW timeouts (ms). CPOWs are only timed
+# out by the hang monitor.
+- name: dom.ipc.cpow.timeout
+  type: uint32_t
+  value: 500
+  mirror: always
+
+#ifdef MOZ_ENABLE_FORKSERVER
+- name: dom.ipc.forkserver.enable
+  type: bool
+#if defined(MOZ_CODE_COVERAGE) || defined(MOZ_ASAN) || defined(MOZ_TSAN) || defined(MOZ_MSAN) || defined(MOZ_UBSAN)
+  value: false
+#else
+  value: @IS_NIGHTLY_BUILD@
+#endif
+  mirror: once
+#endif
+
+#ifdef MOZ_WIDGET_GTK
+#
+# Avoid the use of GTK in content processes if possible, by running
+# them in headless mode, to conserve resources (e.g., connections to
+# the X server).  See the usage in `ContentParent.cpp` for the full
+# definition of "if possible".
+#
+# This does not affect sandbox policies; content processes may still
+# dynamically connect to the display server for, e.g., WebGL.
+- name: dom.ipc.avoid-gtk
+  type: bool
+  value: true
+  mirror: always
+#endif
+
+# Whether or not to collect a paired minidump when force-killing a
+# content process.
+- name: dom.ipc.tabs.createKillHardCrashReports
+  type: bool
+  value: @IS_NOT_RELEASE_OR_BETA@
+  mirror: once
+
+# Enable e10s hang monitoring (slow script checking and plugin hang detection).
+- name: dom.ipc.processHangMonitor
+  type: bool
+  value: true
+  mirror: once
+
+# Whether we report such process hangs
+- name: dom.ipc.reportProcessHangs
+  type: RelaxedAtomicBool
+# Don't report hangs in DEBUG builds. They're too slow and often a
+# debugger is attached.
+#ifdef DEBUG
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# If true, disables non-required re-use of content processes. This can be used
+# in tests to force a new process to be used whenever a process selection
+# decision is made. Setting this pref can cause dom.ipc.processCount limits to
+# be exceeded.
+# WARNING: This will exceed even process limits for the extension or
+# privilegedAbout remote types, which may lead to unexpected breakage!
+# Should only be used for testing.
+- name: dom.ipc.disableContentProcessReuse
+  type: bool
+  value: false
+  mirror: always
+
+# If non-zero, a grace delay (in milliseconds) during which unused content
+# processes are kept available for re-use to avoid unnecessary process churn.
+- name: dom.ipc.processReuse.unusedGraceMs
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# Process launch delay (in milliseconds).
+- name: dom.ipc.processPrelaunch.delayMs
+  type: uint32_t
+# This number is fairly arbitrary ... the intention is to put off
+# launching another app process until the last one has finished
+# loading its content, to reduce CPU/memory/IO contention.
+  value: 1000
+  mirror: always
+
+- name: dom.ipc.processPrelaunch.startupDelayMs
+  type: uint32_t
+# delay starting content processes for a short time after browser start
+# to provide time for the UI to come up
+  value: 1000
+  mirror: always
+
+# Process preallocation cache
+# Only used in fission; in e10s we use 1 always
+- name: dom.ipc.processPrelaunch.fission.number
+  type: uint32_t
+  value: 3
+  mirror: always
+
+# Limit preallocated processes below this memory size (in MB)
+- name: dom.ipc.processPrelaunch.lowmem_mb
+  type: uint32_t
+  value: 4096
+  mirror: always
+
+- name: dom.ipc.processPriorityManager.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.ipc.processPriorityManager.testMode
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.ipc.processPriorityManager.backgroundPerceivableGracePeriodMS
+  type: uint32_t
+#if defined(MOZ_WIDGET_ANDROID)
+  value: 3000
+#else
+  value: 0
+#endif
+  mirror: always
+
+- name: dom.ipc.processPriorityManager.backgroundGracePeriodMS
+  type: uint32_t
+#if defined(MOZ_WIDGET_ANDROID)
+  value: 3000
+#else
+  value: 0
+#endif
+  mirror: always
+
+#ifdef XP_WIN
+- name: dom.ipc.processPriorityManager.backgroundUsesEcoQoS
+  type: bool
+  value: false
+  mirror: always
+#endif
+
+# Support for input type=month, type=week. By default, disabled.
+- name: dom.forms.datetime.others
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+- name: dom.forms.always_allow_pointer_events.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for key events and focus events on disabled elements enabled?
+- name: dom.forms.always_allow_key_and_focus_events.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to disable only the descendants or the parent fieldset element too
+# Note that this still allows it to be selected by `:disable`.
+- name: dom.forms.fieldset_disable_only_descendants.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Does mousewheel-scrolling over a focused <input type="number"> or
+# <input type="range"> field cause the value to increase/decrease (rather
+# than scrolling the page)?
+- name: dom.input.number_and_range_modified_by_mousewheel
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to allow or disallow web apps to cancel `beforeinput` events caused
+# by MozEditableElement#setUserInput() which is used by autocomplete, autofill
+# and password manager.
+- name: dom.input_event.allow_to_cancel_set_user_input
+  type: bool
+  value: false
+  mirror: always
+
+# How long a content process can take before closing its IPC channel
+# after shutdown is initiated.  If the process exceeds the timeout,
+# we fear the worst and kill it.
+- name: dom.ipc.tabs.shutdownTimeoutSecs
+  type: RelaxedAtomicUint32
+#if !defined(DEBUG) && !defined(MOZ_ASAN) && !defined(MOZ_VALGRIND) && !defined(MOZ_TSAN)
+  value: 20
+#else
+  value: 0
+#endif
+  mirror: always
+
+# Whether a native event loop should be used in the content process.
+- name: dom.ipc.useNativeEventProcessing.content
+  type: RelaxedAtomicBool
+#if defined(XP_WIN) || defined(XP_MACOSX)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# If this is true, TextEventDispatcher dispatches keydown and keyup events
+# even during composition (keypress events are never fired during composition
+# even if this is true).
+- name: dom.keyboardevent.dispatch_during_composition
+  type: bool
+  value: true
+  mirror: always
+
+# Enable/disable KeyboardEvent.initKeyEvent function
+- name: dom.keyboardevent.init_key_event.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Enable/disable KeyboardEvent.initKeyEvent function in addons even if it's
+# disabled.
+- name: dom.keyboardevent.init_key_event.enabled_in_addons
+  type: bool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
+# If this is true, keypress events for non-printable keys are dispatched only
+# for event listeners of the system event group in web content.
+- name: dom.keyboardevent.keypress.dispatch_non_printable_keys_only_system_group_in_content
+  type: bool
+  value: true
+  mirror: always
+
+# If this is true, "keypress" event's keyCode value and charCode value always
+# become same if the event is not created/initialized by JS.
+- name: dom.keyboardevent.keypress.set_keycode_and_charcode_to_same_value
+  type: bool
+  value: true
+  mirror: always
+
+# Whether "W3C Web Manifest" processing is enabled
+- name: dom.manifest.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Enable mapped array buffer by default.
+- name: dom.mapped_arraybuffer.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Autoplay Policy Detection https://w3c.github.io/autoplay/
+- name: dom.media.autoplay-policy-detection.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# WebCodecs API
+- name: dom.media.webcodecs.enabled
+  type: RelaxedAtomicBool
+#if defined(MOZ_WIDGET_ANDROID)
+  value: @IS_NIGHTLY_BUILD@
+#else
+  value: true
+#endif
+  mirror: always
+
+# WebCodecs API - Image decoder
+- name: dom.media.webcodecs.image-decoder.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Number of seconds of very quiet or silent audio before considering the audio
+# inaudible.
+- name: dom.media.silence_duration_for_audibility
+  type: AtomicFloat
+  value: 2.0f
+  mirror: always
+
+# Inform mozjemalloc that the foreground content processes can keep more dirty
+# pages in memory.
+- name: dom.memory.foreground_content_processes_have_larger_page_cache
+  type: bool
+  value: true
+  mirror: always
+
+# 0 no-op
+# 1 free dirty mozjemalloc pages
+# 2 trigger memory-pressure/heap-minimize
+# 3 trigger memory-pressure/low-memory
+- name: dom.memory.memory_pressure_on_background
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# Enable meta-viewport support in remote APZ-enabled frames.
+- name: dom.meta-viewport.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Timeout clamp in ms for timeouts we clamp.
+- name: dom.min_timeout_value
+  type: RelaxedAtomicInt32
+  value: 4
+  mirror: always
+
+# Timeout clamp in ms for background windows.
+- name: dom.min_background_timeout_value
+  type: int32_t
+  value: 1000
+  mirror: always
+
+# Timeout clamp in ms for background windows when throttling isn't enabled.
+- name: dom.min_background_timeout_value_without_budget_throttling
+  type: int32_t
+  value: 1000
+  mirror: always
+
+# Are missing-property use counters for certain DOM attributes enabled?
+- name: dom.missing_prop_counters.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to dispatch mutation events.
+- name: dom.mutation_events.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Limit of location change caused by content scripts in a time span per
+# BrowsingContext. This includes calls to History and Location APIs.
+- name: dom.navigation.navigationRateLimit.count
+  type: uint32_t
+  value: 200
+  mirror: always
+
+# Time span in seconds for location change rate limit.
+- name: dom.navigation.navigationRateLimit.timespan
+  type: uint32_t
+  value: 10
+  mirror: always
+
+# Whether to allow <object> and <embed> element loads to be retargeted to an
+# external application or download.
+- name: dom.navigation.object_embed.allow_retargeting
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the navigation API will be exposed.
+- name: dom.navigation.webidl.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  do_not_use_directly: true
+
+# Network Information API
+# This feature is not available on Firefox desktop. It exposes too much
+# user information. Let's be consistent and disable it on Android.
+# But let's keep it around in case it becomes necessary for webcompat
+# reasons
+# https://bugzilla.mozilla.org/show_bug.cgi?id=1637922
+- name: dom.netinfo.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether we should open noopener links in a new process.
+- name: dom.noopener.newprocess.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether origin trials are enabled.
+- name: dom.origin-trials.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we use the test key to verify tokens.
+- name: dom.origin-trials.test-key.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Origin trial state for "TestTrial".
+# 0: normal, 1: always-enabled, 2: always-disabled
+- name: dom.origin-trials.test-trial.state
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Origin trial state for COEP: Credentialless.
+# 0: normal, 1: always-enabled, 2: always-disabled
+- name: dom.origin-trials.coep-credentialless.state
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Origin trial state for Private Attribution
+# 0: normal, 1: always-enabled, 2: always-disabled
+- name: dom.origin-trials.private-attribution.state
+  type: RelaxedAtomicInt32
+#ifdef ANDROID
+  value: 2
+#else
+  value: 0
+#endif
+  mirror: always
+
+# Origin trial state for MLS
+# 0: normal, 1: always-enabled, 2: always-disabled
+- name: dom.origin-trials.mls.state
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# User pref to control whether Private Attribution
+# information should be collected / submitted.
+- name: dom.private-attribution.submission.enabled
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# Is support for Window.paintWorklet enabled?
+- name: dom.paintWorklet.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Enable/disable the PaymentRequest API
+- name: dom.payments.request.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether a user gesture is required to call PaymentRequest.prototype.show().
+- name: dom.payments.request.user_interaction_required
+  type: bool
+  value: true
+  mirror: always
+
+# Time in milliseconds for PaymentResponse to wait for
+# the Web page to call complete().
+- name: dom.payments.response.timeout
+  type: uint32_t
+  value: 5000
+  mirror: always
+
+# Enable printing performance marks/measures to log
+- name: dom.performance.enable_user_timing_logging
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Enable notification of performance timing
+- name: dom.performance.enable_notify_performance_timing
+  type: bool
+  value: false
+  mirror: always
+
+# Is support for PerformanceTiming.timeToContentfulPaint enabled?
+- name: dom.performance.time_to_contentful_paint.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Is support for PerformanceTiming.timeToFirstInteractive enabled?
+- name: dom.performance.time_to_first_interactive.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Is support for PerformanceTiming.timeToNonBlankPaint enabled?
+- name: dom.performance.time_to_non_blank_paint.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Is support for Element.requestPointerLock enabled?
+# This is added for accessibility purpose. When user has no way to exit
+# pointer lock (e.g. no keyboard available), they can use this pref to
+# disable the Pointer Lock API altogether.
+- name: dom.pointer-lock.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# re-SAB: Whether to allow postMessage of a SharedArrayBuffer if various
+# preconditions related to COOP and COEP are met
+- name: dom.postMessage.sharedArrayBuffer.withCOOP_COEP
+  type: bool
+  value: true
+  mirror: once
+
+# Overridden in all.js on RELEASE_OR_BETA in order to add the locked attribute.
+- name: dom.postMessage.sharedArrayBuffer.bypassCOOP_COEP.insecure.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Should we speculatively prefetch dns for anchor elements on http documents
+- name: dom.prefetch_dns_for_anchor_http_document
+  type: bool
+  value: true
+  mirror: always
+
+# Should we speculatively prefetch dns for anchor elements on https documents
+- name: dom.prefetch_dns_for_anchor_https_document
+  type: bool
+  value: false
+  mirror: always
+
+# This currently only affects XHTML. For XUL the cache is always allowed.
+- name: dom.prototype_document_cache.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Push
+- name: dom.push.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Indicate the deprecated aesgcm support in PushManager.supportedContentEncodings.
+#
+# This does not affect actual aesgcm support, any new and existing subscriptions
+# can still use aesgcm regardless of this pref.
+- name: dom.push.indicate_aesgcm_support.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Preference that is primarily used for testing of problematic file paths.
+# It can also be used for switching between different storage directories, but
+# such feature is not officially supported.
+- name: dom.quotaManager.storageName
+  type: String
+  value: "storage"
+  mirror: never
+
+# An upper limit for the "age" of an origin. Any origin which is older than the
+# threshold is considered as unaccessed. That doesn't necessarily mean that
+# such origins will be immediatelly archived. They will be archived only when
+# dom.quotaManager.checkQuotaInfoLoadTime is true and loading of quota info
+# takes a long time (dom.quotaManager.longQuotaInfoLoadTimeThresholdMs is used
+# to decide what is a long quota info load time).
+- name: dom.quotaManager.unaccessedForLongTimeThresholdSec
+  type: RelaxedAtomicUint32
+  value: 33696000 # 13 months
+  mirror: always
+
+# Should we try to load origin information from the cache?
+# See bug 1563023 for more details.
+- name: dom.quotaManager.loadQuotaFromCache
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Should we check build ID as part of the cache validation?
+# When enabled, the cache is invalidated on any upgrade (or downgrade),
+# ensuring that changes in how quota usage is calculated can't cause
+# inconsistencies at the cost of a slower initialization. Currently, this
+# should only be set to false in tests using a packaged profile that inherently
+# includes a build id different from the building running the tests. In the
+# future this may be set to false if we are confident that we have sufficiently
+# thorough schema versioning.
+- name: dom.quotaManager.caching.checkBuildId
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Should we check quota info load time and eventually archive some unaccessed
+# origins if loading of quota info takes a long time ?
+- name: dom.quotaManager.checkQuotaInfoLoadTime
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# An upper limit for quota info load time, anything which takes longer than the
+# threshold is considered as long quota info load time.
+- name: dom.quotaManager.longQuotaInfoLoadTimeThresholdMs
+  type: RelaxedAtomicUint32
+  value: 21000 # 21 seconds
+  mirror: always
+
+# Preference that users can set to override temporary storage smart limit
+# calculation.
+- name: dom.quotaManager.temporaryStorage.fixedLimit
+  type: RelaxedAtomicInt32
+  value: -1
+  mirror: always
+
+# Should we do lazy initialization of origins ?
+# When enabled, origins for temporary storage are not initialized during
+# temporary storage initialization, they are initialized lazily instead.
+# If there are other origins in the group, they are initialized all together.
+# This feature is currently still in development and experimental, not
+# recommended for normal use yet.
+- name: dom.quotaManager.temporaryStorage.lazyOriginInitialization
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Should we trigger initialization of all temporary origins in the background?
+# When enabled, temporary origins collected during temporary storage
+# initialization are initialized in the background. The background
+# initialization of temporary origins is always done for entire groups of
+# origins to preserve consistency of quota checks related to the group limit.
+# This feature is currently still in development and experimental, not
+# recommended for normal use yet.
+- name: dom.quotaManager.temporaryStorage.triggerOriginInitializationInBackground
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# A pref that is used to slow down origin operations for testing purposes.
+- name: dom.quotaManager.originOperations.pauseOnIOThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# A pref that is used to slow down storage initialization for testing purposes.
+- name: dom.quotaManager.storageInitialization.pauseOnIOThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# A pref that is used to slow down origin initialization for testing purposes.
+- name: dom.quotaManager.originInitialization.pauseOnIOThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# A pref that is used to enable testing features.
+- name: dom.quotaManager.testing
+  type: SequentiallyConsistentAtomicBool
+  value: false
+  mirror: always
+
+#if defined(XP_WIN)
+  # Preference that is used to set nsILocalFileWin::useDOSDevicePathSyntax
+  # attribute for all local file instances created by QuotaManager and its
+  # clients. The value of this preference is cached so changing the preference
+  # during runtime has no effect.
+  # See bug 1626846 for setting this to false by default.
+-   name: dom.quotaManager.useDOSDevicePathSyntax
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+    do_not_use_directly: true
+
+  # Preference that is used to enable the hack for overrriding xFullPathname in
+  # QuotaVFS.
+-   name: dom.quotaManager.overrideXFullPathname
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#elif defined(XP_UNIX)
+  # Preference that is used to enable the overriding of Unix xFullPathname
+  # implementation in QuotaVFS.
+-   name: dom.quotaManager.overrideXFullPathnameUnix
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#endif
+
+# How many times we should retry directory removal or renaming if access was
+# denied?
+- name: dom.quotaManager.directoryRemovalOrRenaming.maxRetries
+  type: RelaxedAtomicUint32
+#ifdef XP_WIN
+  value: 10
+#else
+  value: 0
+#endif
+  mirror: always
+
+# How long we should wait between retries (in milliseconds)?
+- name: dom.quotaManager.directoryRemovalOrRenaming.delayMs
+  type: RelaxedAtomicUint32
+  value: 200
+  mirror: always
+
+#ifdef MOZ_BACKGROUNDTASKS
+# Use a Background Task to delete files at shutdown.
+- name: dom.quotaManager.backgroundTask.enabled
+  type: bool
+#ifdef XP_MACOSX
+# Needs to figure out how to prevent bug 1827486.
+  value: false
+#else
+  value: true
+#endif
+  mirror: never
+#endif
+
+# A pref that specifies one or more failure categories to trigger artificial
+# failures for testing purposes. Multiple categories can be combined using
+# bitwise OR to represent various failure points within the code.
+- name: dom.quotaManager.artificialFailure.categories
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# A probability (0-100) used to determine the likelihood of triggering an
+# artificial failure for testing purposes. This value is applied when the
+# specified failure categories match to decide if the failure should occur.
+- name: dom.quotaManager.artificialFailure.probability
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# An error code used to trigger an artificial failure for testing purposes.
+# This code is returned when the specified failure categories match and the
+# failure is triggered based on the configured probability.
+- name: dom.quotaManager.artificialFailure.errorCode
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Use to control to dump CheckedUnsafePtr creation stack and assignment stacks.
+- name: dom.checkedUnsafePtr.dumpStacks.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# A pref that is used to slow down database initialization for testing purposes.
+- name: dom.simpledb.databaseInitialization.pauseOnIOThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Determines within what distance of a tick mark, in pixels, dragging an input
+# range range will snap the range's value to that tick mark. By default, this is
+# half the default width of the range thumb.
+- name: dom.range_element.magnet_effect_threshold
+  type: float
+  value: 10.0f
+  mirror: always
+
+# Reporting API.
+- name: dom.reporting.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: dom.reporting.testing.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: dom.reporting.featurePolicy.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: dom.reporting.crash.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: dom.reporting.header.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# In seconds. The timeout to remove not-active report-to endpoints.
+- name: dom.reporting.cleanup.timeout
+  type: uint32_t
+  value: 3600
+  mirror: always
+
+# Any X seconds the reports are dispatched to endpoints.
+- name: dom.reporting.delivering.timeout
+  type: uint32_t
+  value: 5
+  mirror: always
+
+# How many times the delivering of a report should be tried.
+- name: dom.reporting.delivering.maxFailures
+  type: uint32_t
+  value: 3
+  mirror: always
+
+# How many reports should be stored in the report queue before being delivered.
+- name: dom.reporting.delivering.maxReports
+  type: uint32_t
+  value: 100
+  mirror: always
+
+# Enable Screen Orientation lock
+- name: dom.screenorientation.allow-lock
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Enable Screen Wake Lock API
+- name: dom.screenwakelock.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to enable the JavaScript start-up cache. This causes one of the first
+# execution to record the bytecode of the JavaScript function used, and save it
+# in the existing cache entry. On the following loads of the same script, the
+# bytecode would be loaded from the cache instead of being generated once more.
+- name: dom.script_loader.bytecode_cache.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Ignore the heuristics of the bytecode cache, and always record on the first
+# visit. (used for testing purposes).
+
+# Choose one strategy to use to decide when the bytecode should be encoded and
+# saved. The following strategies are available right now:
+#   * -2 : (reader mode) The bytecode cache would be read, but it would never
+#          be saved.
+#   * -1 : (eager mode) The bytecode would be saved as soon as the script is
+#          seen for the first time, independently of the size or last access
+#          time.
+#   *  0 : (default) The bytecode would be saved in order to minimize the
+#          page-load time.
+#
+# Other values might lead to experimental strategies. For more details, have a
+# look at: ScriptLoader::ShouldCacheBytecode function.
+- name: dom.script_loader.bytecode_cache.strategy
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Select which parse/delazification strategy should be used while parsing
+# scripts off-main-thread. (see CompileOptions.h, DelazificationOption enum)
+#
+#   0: On-demand only. Delazification will be triggered only on the main thread
+#      before the execution of the function.
+#
+#   1: Compare on-demand delazification (= 0) with concurrent depth-first
+#      delazification (= 2).
+#
+#   2: Depth-first. Delazify all functions off-thread in the order of appearance
+#      in the source.
+#
+#   3: Large-first. Delazify all functions off-thread starting with the largest
+#      functions first, and the smallest as the last one to be delazified, where
+#      the size of function is measured in bytes between the start to the end of
+#      the function.
+#
+# 255: Parse everything eagerly, from the first parse. All functions are parsed
+#      at the same time as the top-level of a file.
+- name: dom.script_loader.delazification.strategy
+  type: uint32_t
+  value: 255
+  mirror: always
+
+# Maximum total size after which the delazification strategy, specified by
+# `dom.script_loader.delazification.strategy`, is no longer applied, and the
+# on-demand strategy is used by default.
+#
+# -1 disable the threshold, and delazification strategy is applied to all
+# scripts.
+#
+# Default value is 10MB for utf8 scripts.
+- name: dom.script_loader.delazification.max_size
+  type: int32_t
+  value: 10485760
+  mirror: always
+
+# Minimum memory, in GB, required to enable delazification strategy, specified
+# by `dom.script_loader.delazification.strategy`. Otherwise, the on-demand
+# delazification strategy is used.
+- name: dom.script_loader.delazification.min_mem
+  type: int32_t
+  value: 2
+  mirror: always
+
+# Enable  speculative off main thread parsing of external scripts as
+# soon as they are fetched.
+- name: dom.script_loader.external_scripts.speculative_omt_parse.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Speculatively compile non parser inserted scripts
+- name: dom.script_loader.external_scripts.speculate_non_parser_inserted.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Speculatively compile async scripts
+- name: dom.script_loader.external_scripts.speculate_async.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Speculatively compile link preload scripts
+- name: dom.script_loader.external_scripts.speculate_link_preload.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Cache stencil across navigation
+- name: dom.script_loader.navigation_cache
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.securecontext.allowlist_onions
+  type: bool
+  value: false
+  mirror: always
+
+# This pref enables the featurePolicy header support.
+- name: dom.security.featurePolicy.header.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.security.featurePolicy.experimental.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Expose the 'featurePolicy' attribute in document and HTMLIFrameElement
+- name: dom.security.featurePolicy.webidl.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Perform IPC based Principal vetting in ContentParent
+- name: dom.security.enforceIPCBasedPrincipalVetting
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# For testing purposes only: Flipping this pref to true allows
+# to skip the allowlist for about: pages and do not ship with a
+# CSP and NS_ASSERT right away.
+- name: dom.security.skip_about_page_csp_allowlist_and_assert
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# For testing purposes only: Flipping this pref to true allows
+# to skip the assertion that every about page ships with a CSP.
+- name: dom.security.skip_about_page_has_csp_assert
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# For testing purposes only: Flipping this pref to true allows
+# to skip the assertion that HTML fragments (e.g. innerHTML) can
+# not be used within chrome code or about: pages.
+- name: dom.security.skip_html_fragment_assertion
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# For testing purposes only; Flipping this pref to true allows
+# to skip the assertion that remote scripts can not be loaded
+# in system privileged contexts.
+- name: dom.security.skip_remote_script_assertion_in_system_priv_context
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If and only if true, support for Trusted Types
+# (https://w3c.github.io/trusted-types/dist/spec/) is enabled.
+- name: dom.security.trusted_types.enabled
+  type: RelaxedAtomicBool
+  value: False
+  mirror: always
+
+# If true, all content requests will get upgraded to HTTPS://
+# (some Firefox functionality requests, like OCSP will not be affected)
+- name: dom.security.https_only_mode
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true, all content requests in Private Browsing Mode will get
+# upgraded to HTTPS://. (If dom.security.https_only_mode is set
+# to true then this pref has no effect)
+- name: dom.security.https_only_mode_pbm
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true, sends http background request for top-level sites to
+# counter long timeouts.
+- name: dom.security.https_only_mode_send_http_background_request
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Time limit, in milliseconds, before sending the http background
+# request for HTTPS-Only and HTTPS-First
+- name: dom.security.https_only_fire_http_request_background_timer_ms
+  type: RelaxedAtomicUint32
+  value: 3000
+  mirror: always
+
+# If true, tries to break upgrade downgrade cycles where https-only tries
+# to upgrad ethe connection, but the website tries to downgrade again.
+- name: dom.security.https_only_mode_break_upgrade_downgrade_endless_loop
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true and HTTPS-only mode is enabled, requests
+# to local IP addresses are also upgraded
+- name: dom.security.https_only_mode.upgrade_local
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true and HTTPS-only mode is enabled, requests
+# to .onion hosts are also upgraded
+- name: dom.security.https_only_mode.upgrade_onion
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# WARNING: Don't ever update that pref manually! It is only used
+# for telemetry purposes and allows to reason about retention of
+# the pref dom.security.https_only_mode from above.
+- name: dom.security.https_only_mode_ever_enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# WARNING: Don't ever update that pref manually! It is only used
+# for telemetry purposes and allows to reason about retention of
+# the pref dom.security.https_only_mode_pbm from above.
+- name: dom.security.https_only_mode_ever_enabled_pbm
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true checks for secure www connections when https fails
+# and gives the user suggestions on the error page
+- name: dom.security.https_only_mode_error_page_user_suggestions
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true, top-level request will get upgraded to HTTPS and
+# downgraded again if the request failed.
+- name: dom.security.https_first
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# If true, HTTPS-First will upgrade non-default ports
+- name: dom.security.https_first_for_custom_ports
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true, top-level requests in Private Browsing Mode will get
+# upgraded to HTTPS. (If dom.security.https_first
+# is set to true then this pref has no effect)
+- name: dom.security.https_first_pbm
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true, top-level requests that are initiated from the address
+# bar and with an empty scheme get upgraded to HTTPS
+# with a fallback
+- name: dom.security.https_first_schemeless
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true, will add a special temporary HTTPS-First exception for a site when a
+# HTTPS-First upgrade fails.
+- name: dom.security.https_first_add_exception_on_failure
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.security.https_first_exception_lifetime
+  type: uint32_t
+  value: 7*24*60*60*1000 # 7 days in milliseconds
+  mirror: always
+
+- name: dom.security.unexpected_system_load_telemetry_enabled
+  type: bool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# pref controls `Sanitizer` API being exposed
+# https://wicg.github.io/sanitizer-api/
+- name: dom.security.sanitizer.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Pref that controls the Element.setHTML API idenpendetly of the sanitizer
+# API.
+- name: dom.security.setHTML.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Logs elements and attributes removed by the Sanitizer API to the console.
+- name: dom.security.sanitizer.logging
+  type: bool
+  value: false
+  mirror: always
+
+# pref controls credential chooser UI for testing. When true, UI is not shown and
+# either a credential with ID `wpt-pick-me` is selected, or none.
+- name: dom.security.credentialmanagement.chooser.testing.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# pref controls `identity` credentials being exposed
+- name: dom.security.credentialmanagement.identity.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# pref controls "heavyweight" network discoverable `identity` credentials being exposed
+- name: dom.security.credentialmanagement.identity.heavyweight.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# pref controls storable "lightweight" `identity` credentials being exposed
+- name: dom.security.credentialmanagement.identity.lightweight.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# pref controls `identity` credential UI for testing. When true, UI is not shown and
+# the first option in the account and provider lists are chosen
+- name: dom.security.credentialmanagement.identity.select_first_in_ui_lists
+  type: bool
+  value: false
+  mirror: always
+
+# pref controls `identity` credential platform behavior for testing. When true,
+# the .well-known file check is not performed.
+- name: dom.security.credentialmanagement.identity.test_ignore_well_known
+  type: bool
+  value: false
+  mirror: always
+
+# pref controls whether we should delay identity credential rejections at all
+- name: dom.security.credentialmanagement.identity.reject_delay.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# pref controls how long we should delay identity credential rejections if enabled
+- name: dom.security.credentialmanagement.identity.reject_delay.duration_ms
+  type: uint32_t
+  value: 120000
+  mirror: always
+
+# Enforce origin check whenever a content process tries to set a document URI
+- name: dom.security.setdocumenturi
+  type: bool
+  value: true
+  mirror: always
+
+# Whether or not selection events on text controls are enabled.
+- name: dom.select_events.textcontrols.selectionchange.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.select_events.textcontrols.selectstart.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.select.showPicker.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.send_after_paint_to_content
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.separate_event_queue_for_post_message.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.arena_allocator.enabled
+  type: bool
+  value: true
+  mirror: once
+
+- name: dom.serviceWorkers.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.serviceWorkers.navigationPreload.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Mitigates ServiceWorker navigation faults by bypassing the ServiceWorker on
+# navigation faults.  This is more extensive than just resetting interception
+# because we also mark the page as uncontrolled so that subresources will not
+# go to the ServiceWorker either.
+- name: dom.serviceWorkers.mitigations.bypass_on_fault
+  type: bool
+  value: true
+  mirror: always
+
+# Additional ServiceWorker navigation mitigation control to unregister the
+# ServiceWorker after multiple faults are encountered. The mitigation is
+# disabled when this is set to zero, otherwise this is the number of faults that
+# need to occur for a specific ServiceWorker before it will be unregistered.
+- name: dom.serviceWorkers.mitigations.navigation_fault_threshold
+  type: uint32_t
+  value: 3
+  mirror: always
+
+# This is the group usage head room for service workers.
+# The quota usage mitigation algorithm uses this preference to determine if the
+# origin or also group data should be cleared or not.
+# The default value is 400 MiB.
+- name: dom.serviceWorkers.mitigations.group_usage_headroom_kb
+  type: uint32_t
+  value: 400 * 1024
+  mirror: always
+
+- name: dom.serviceWorkers.testing.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether ServiceWorkerManager should persist the service worker
+# registered by temporary installed extension (only meant to be used
+# for testing purpose, to make it easier to test some particular scenario
+# with a temporary installed addon, which doesn't need to be signed to be
+# installed on release channel builds).
+- name: dom.serviceWorkers.testing.persistTemporarilyInstalledAddons
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: dom.storage.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.workers.pFetch.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.workers.importScripts.enforceStrictMimeType
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.workers.throttling.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: dom.workers.serialized-sab-access
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Enable stronger diagnostics on worker shutdown.
+# If this is true, we will potentially run an extra GCCC when a  worker should
+# exit its DoRunLoop but holds any WorkerRef and we will MOZ_DIAGNOSTIC_ASSERT
+# when during that extra GCCC such a WorkerRef is freed.
+- name: dom.workers.GCCC_on_potentially_last_event
+  type: RelaxedAtomicBool
+#if defined(FUZZING) || defined(DEBUG)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: dom.sitepermsaddon-provider.enabled
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# Server-Sent Events
+# Equal to the DEFAULT_RECONNECTION_TIME_VALUE value in nsEventSource.cpp
+- name: dom.serverEvents.defaultReconnectionTime
+  type: RelaxedAtomicUint32
+  value: 5000 # in milliseconds
+  mirror: always
+
+# Whether automatic storage access granting heuristics should be turned on.
+- name: dom.storage_access.auto_grants
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.storage_access.auto_grants.delayed
+  type: bool
+  value: true
+  mirror: always
+
+# Storage-access API.
+- name: dom.storage_access.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Forward-Declared Storage-access API.
+- name: dom.storage_access.forward_declared.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# How long the Forward-Declared Storage-access API allows between pair requests
+# in seconds
+- name: dom.storage_access.forward_declared.lifetime
+  type: uint32_t
+  value: 15 * 60
+  mirror: always
+
+# The maximum number of origins that a given third-party tracker is allowed
+# to have concurrent access to before the user is presented with a storage
+# access prompt.  Only effective when the auto_grants pref is turned on.
+- name: dom.storage_access.max_concurrent_auto_grants
+  type: int32_t
+  value: 5
+  mirror: always
+
+- name: dom.storage_access.frame_only
+  type: bool
+  value: true
+  mirror: always
+
+# Only grant storage access to secure contexts.
+- name: dom.storage_access.dont_grant_insecure_contexts
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether the File System API is enabled
+- name: dom.fs.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether the WritableFileStream is enabled or disabled.
+- name: dom.fs.writable_file_stream.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# A pref that is used to enable testing features.
+- name: dom.fs.testing
+  type: SequentiallyConsistentAtomicBool
+  value: false
+  mirror: always
+
+# A pref that is used to slow down database initialization for testing purposes.
+- name: dom.fs.databaseInitialization.pauseOnIOThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# LocalStorage data limit as determined by summing up the lengths of all string
+# keys and values. This is consistent with the legacy implementation and other
+# browser engines. This value should really only ever change in unit testing
+# where being able to lower it makes it easier for us to test certain edge
+# cases. Measured in KiBs.
+- name: dom.storage.default_quota
+  type: RelaxedAtomicUint32
+  # Only allow relatively small amounts of data since performance of the
+  # synchronous IO is very bad. We are enforcing simple per-origin quota only.
+  value: 5 * 1024
+  mirror: always
+
+# Per-site quota for legacy LocalStorage implementation.
+- name: dom.storage.default_site_quota
+  type: RelaxedAtomicUint32
+  value: 25 * 1024
+  mirror: always
+
+# Whether or not the unsupported legacy implemenation should be enabled. Please
+# don't advertise this pref as a way for disabling LSNG. This pref is intended
+# for internal testing only and will be removed in near future. Accidental
+# disabling of LSNG can lead to a data loss in a combination with disabled
+# shadow writes. Disabling of shadow writes is the initial step towards
+# removing legacy implementation and will be done soon.
+- name: dom.storage.enable_unsupported_legacy_implementation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  do_not_use_directly: true
+
+# Whether the migration from unsupported legacy implementation is enabled.
+- name: dom.storage.enable_migration_from_unsupported_legacy_implementation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# The amount of snapshot peak usage which is attempted to be pre-incremented
+# during snapshot creation.
+- name: dom.storage.snapshot_peak_usage.initial_preincrement
+  type: RelaxedAtomicUint32
+  value: 16384
+  mirror: always
+
+# The amount of snapshot peak usage which is attempted to be pre-incremented
+# during snapshot creation if the LocalStorage usage was already close to the
+# limit (a fallback for dom.storage.snapshot_peak_usage.initial_preincrement).
+- name: dom.storage.snapshot_peak_usage.reduced_initial_preincrement
+  type: RelaxedAtomicUint32
+  value: 4096
+  mirror: always
+
+# The amount of snapshot peak usage which is attempted to be pre-incremented
+# beyond the specific values which are subsequently requested after snapshot
+# creation.
+- name: dom.storage.snapshot_peak_usage.gradual_preincrement
+  type: RelaxedAtomicUint32
+  value: 4096
+  mirror: always
+
+# The amount of snapshot peak usage which is attempted to be pre-incremented
+# beyond the specific values which are subsequently requested after snapshot
+# creation if the LocalStorage total usage was already close to the limit
+# (a fallback for dom.storage.snapshot_peak_usage.gradual_preincrement).
+- name: dom.storage.snapshot_peak_usage.reduced_gradual_preincrement
+  type: RelaxedAtomicUint32
+  value: 1024
+  mirror: always
+
+# How long between a snapshot becomes idle and when we actually finish the
+# snapshot. This preference is only used when "dom.storage.snapshot_reusing"
+# is true.
+- name: dom.storage.snapshot_idle_timeout_ms
+  type: uint32_t
+  value: 5000
+  mirror: always
+
+# Is support for Storage test APIs enabled?
+- name: dom.storage.testing
+  type: SequentiallyConsistentAtomicBool
+  value: false
+  mirror: always
+
+# A pref that is used to slow down database initialization for testing purposes.
+- name: dom.storage.databaseInitialization.pauseOnIOThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# A pref that is used to slow down request finalization for testing purposes.
+- name: dom.storage.requestFinalization.pauseOnDOMFileThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# This enables the SVGPathSegment APIs
+- name: dom.svg.pathSegment.enabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# For area and anchor elements with target=_blank and no rel set to
+# opener/noopener.
+- name: dom.targetBlankNoOpener.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for Selection.GetRangesForInterval enabled?
+- name: dom.testing.selection.GetRangesForInterval
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.testing.structuredclonetester.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# To enable TestUtils interface on WPT
+- name: dom.testing.testutils.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: dom.text_fragments.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+- name: dom.textMetrics.actualBoundingBox.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.textMetrics.baselines.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.textMetrics.emHeight.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.textMetrics.fontBoundingBox.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Time (in ms) that it takes to regenerate 1ms.
+- name: dom.timeout.background_budget_regeneration_rate
+  type: RelaxedAtomicInt32
+  value: 100
+  mirror: always
+
+# Time (in ms) that it takes to regenerate 1ms.
+- name: dom.timeout.foreground_budget_regeneration_rate
+  type: RelaxedAtomicInt32
+  value: 1
+  mirror: always
+
+# Maximum value (in ms) for the background budget. Only valid for
+# values greater than 0.
+- name: dom.timeout.background_throttling_max_budget
+  type: RelaxedAtomicInt32
+  value: 50
+  mirror: always
+
+# Maximum value (in ms) for the foreground budget. Only valid for
+# values greater than 0.
+- name: dom.timeout.foreground_throttling_max_budget
+  type: RelaxedAtomicInt32
+  value: -1
+  mirror: always
+
+# The maximum amount a timeout can be delayed by budget throttling.
+- name: dom.timeout.budget_throttling_max_delay
+  type: RelaxedAtomicInt32
+  value: 15000
+  mirror: always
+
+# Turn on budget throttling by default.
+- name: dom.timeout.enable_budget_timer_throttling
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Should we defer timeouts and intervals while loading a page.  Released
+# on Idle or when the page is loaded.
+- name: dom.timeout.defer_during_load
+  type: bool
+  value: true
+  mirror: always
+
+# Maximum amount of time in milliseconds consecutive setTimeout()/setInterval()
+# callback are allowed to run before yielding the event loop.
+- name: dom.timeout.max_consecutive_callbacks_ms
+  type: RelaxedAtomicUint32
+  value: 4
+  mirror: always
+
+# Maximum deferral time for setTimeout/Interval in milliseconds
+- name: dom.timeout.max_idle_defer_ms
+  type: uint32_t
+  value: 10*1000
+  mirror: always
+
+# Delay in ms from document load until we start throttling background timeouts.
+- name: dom.timeout.throttling_delay
+  type: RelaxedAtomicInt32
+  value: 30000
+  mirror: always
+
+# UDPSocket API
+- name: dom.udpsocket.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to dump worker use counters
+- name: dom.use_counters.dump.worker
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to dump document use counters
+- name: dom.use_counters.dump.document
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to dump page use counters
+- name: dom.use_counters.dump.page
+  type: bool
+  value: false
+  mirror: always
+
+# Time limit, in milliseconds, for user gesture transient activation.
+- name: dom.user_activation.transient.timeout
+  type: uint32_t
+  value: 5000
+  mirror: always
+
+# Whether to treat the clicks on scrollbars as user interaction with web content.
+- name: dom.user_activation.ignore_scrollbars
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to shim a Components object on untrusted windows.
+- name: dom.use_components_shim
+  type: bool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
+- name: dom.vibrator.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: dom.vibrator.max_vibrate_ms
+  type: RelaxedAtomicUint32
+  value: 10000
+  mirror: always
+
+- name: dom.vibrator.max_vibrate_list_len
+  type: RelaxedAtomicUint32
+  value: 128
+  mirror: always
+
+# Is support for View Transitions Level 1 enabled?
+- name: dom.viewTransitions.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Timeout for view transitions.
+# TODO(emilio): Figure out the right time-out, Blink uses between 4 and 15
+# seconds.
+- name: dom.viewTransitions.timeout-ms
+  type: uint32_t
+  value: 10000
+  mirror: always
+
+# Is support for WebVR APIs enabled?
+# Disabled everywhere, but not removed.
+- name: dom.vr.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Should VR sessions always be reported as supported, without first
+# checking for VR runtimes?  This will prevent permission prompts
+# from being suppressed on machines without VR runtimes and cause
+# navigator.xr.isSessionSupported to always report that immersive-vr
+# is supported.
+- name: dom.vr.always_support_vr
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Should AR sessions always be reported as supported, without first
+# checking for AR runtimes?  This will prevent permission prompts
+# from being suppressed on machines without AR runtimes and cause
+# navigator.xr.isSessionSupported to always report that immersive-ar
+# is supported.
+- name: dom.vr.always_support_ar
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# It is often desirable to automatically start vr presentation when
+# a user puts on the VR headset.  This is done by emitting the
+# Window.vrdisplayactivate event when the headset's sensors detect it
+# being worn.  This can result in WebVR content taking over the headset
+# when the user is using it outside the browser or inadvertent start of
+# presentation due to the high sensitivity of the proximity sensor in some
+# headsets, so it is off by default.
+- name: dom.vr.autoactivate.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Minimum number of milliseconds that the browser will wait before
+# attempting to poll again for connected VR controllers.  The browser
+# will not attempt to poll for VR controllers until it needs to use them.
+- name: dom.vr.controller.enumerate.interval
+  type: RelaxedAtomicInt32
+  value: 1000
+  mirror: always
+
+# The threshold value of trigger inputs for VR controllers.
+- name: dom.vr.controller_trigger_threshold
+  type: AtomicFloat
+  value: 0.1f
+  mirror: always
+
+# Minimum number of milliseconds that the browser will wait before
+# attempting to poll again for connected VR displays.  The browser
+# will not attempt to poll for VR displays until it needs to use
+# them, such as when detecting a WebVR site.
+- name: dom.vr.display.enumerate.interval
+  type: RelaxedAtomicInt32
+  value: 5000
+  mirror: always
+
+# The number of milliseconds since last frame start before triggering a new
+# frame. When content is failing to submit frames on time or the lower level
+# VR platform APIs are rejecting frames, it determines the rate at which RAF
+# callbacks will be called.
+- name: dom.vr.display.rafMaxDuration
+  type: RelaxedAtomicUint32
+  value: 50
+  mirror: always
+
+# Minimum number of milliseconds the browser will wait before attempting
+# to re-start the VR service after an enumeration returned no devices.
+- name: dom.vr.external.notdetected.timeout
+  type: RelaxedAtomicInt32
+  value: 60000
+  mirror: always
+
+# Minimum number of milliseconds the browser will wait before attempting
+# to re-start the VR service after a VR API (eg, OpenVR or Oculus)
+# requests that we shutdown and unload its libraries.
+# To ensure that we don't interfere with VR runtime software auto-updates,
+# we will not attempt to re-load the service until this timeout has elapsed.
+- name: dom.vr.external.quit.timeout
+  type: RelaxedAtomicInt32
+  value: 10000
+  mirror: always
+
+# Minimum number of milliseconds that the VR session will be kept
+# alive after the browser and content no longer are using the
+# hardware.  If a VR multitasking environment, this should be set
+# very low or set to 0.
+- name: dom.vr.inactive.timeout
+  type: RelaxedAtomicInt32
+  value: 5000
+  mirror: always
+
+# Maximum number of milliseconds the browser will wait for content to call
+# VRDisplay.requestPresent after emitting vrdisplayactivate during VR
+# link traversal.  This prevents a long running event handler for
+# vrdisplayactivate from later calling VRDisplay.requestPresent, which would
+# result in a non-responsive browser in the VR headset.
+- name: dom.vr.navigation.timeout
+  type: RelaxedAtomicInt32
+  value: 5000
+  mirror: always
+
+# Oculus device
+- name: dom.vr.oculus.enabled
+  type: RelaxedAtomicBool
+#if defined(HAVE_64BIT_BUILD) && !defined(ANDROID)
+  # We are only enabling WebVR by default on 64-bit builds (Bug 1384459).
+  value: true
+#else
+  # On Android, this pref is irrelevant.
+  value: false
+#endif
+  mirror: always
+
+# When enabled, Oculus sessions may be created with the ovrInit_Invisible
+# flag if a page is using tracking but not presenting.  When a page
+# begins presenting VR frames, the session will be re-initialized without
+# the flag.  This eliminates the "Firefox not responding" warnings in
+# the headset, but might not be compatible with all versions of the Oculus
+# runtime.
+- name: dom.vr.oculus.invisible.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Minimum number of milliseconds after content has stopped VR presentation
+# before the Oculus session is re-initialized to an invisible / tracking
+# only mode.  If this value is too high, users will need to wait longer
+# after stopping WebVR presentation before automatically returning to the
+# Oculus home interface.  (They can immediately return to the Oculus Home
+# interface through the Oculus HUD without waiting this duration)
+# If this value is too low, the Oculus Home interface may be visible
+# momentarily during VR link navigation.
+- name: dom.vr.oculus.present.timeout
+  type: RelaxedAtomicInt32
+  value: 500
+  mirror: always
+
+# OpenVR device
+- name: dom.vr.openvr.enabled
+  type: RelaxedAtomicBool
+#if !defined(HAVE_64BIT_BUILD) && !defined(ANDROID)
+  # We are only enabling WebVR by default on 64-bit builds (Bug 1384459).
+  value: false
+#elif defined(XP_WIN) || defined(XP_MACOSX)
+  # We enable OpenVR by default for Windows and macOS.
+  value: true
+#else
+  # See Bug 1310663 (Linux).  On Android, this pref is irrelevant.
+  value: false
+#endif
+  mirror: always
+
+# OSVR device
+- name: dom.vr.osvr.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Pose prediction reduces latency effects by returning future predicted HMD
+# poses to callers of the WebVR API.  This currently only has an effect for
+# Oculus Rift on SDK 0.8 or greater.
+- name: dom.vr.poseprediction.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enable a separate process for VR module.
+- name: dom.vr.process.enabled
+  type: bool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+- name: dom.vr.process.startup_timeout_ms
+  type: int32_t
+  value: 5000
+  mirror: once
+
+# Puppet device, used for simulating VR hardware within tests and dev tools.
+- name: dom.vr.puppet.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Starting VR presentation is only allowed within a user gesture or event such
+# as VRDisplayActivate triggered by the system. dom.vr.require-gesture allows
+# this requirement to be disabled for special cases such as during automated
+# tests or in a headless kiosk system.
+- name: dom.vr.require-gesture
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Is support for WebXR APIs enabled?
+- name: dom.vr.webxr.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Points in the native bounds geometry are required to be quantized
+# sufficiently to prevent fingerprinting. The WebXR spec suggests
+# quantizing to the nearest 5 centimeters.
+- name: dom.vr.webxr.quantization
+  type: AtomicFloat
+  value: 0.05f
+  mirror: always
+
+#ifdef XP_WIN
+  # Control firing WidgetMouseEvent by handling Windows pointer messages or
+  # mouse messages.
+-   name: dom.w3c_pointer_events.dispatch_by_pointer_messages
+    type: bool
+    value: true
+    mirror: always
+
+-   name: dom.w3c_pointer_events.scroll_by_pen.enabled
+    type: bool
+    value: true
+    mirror: always
+#endif
+
+# If the value is >= 0, it will be used for max touch points in child processes.
+- name: dom.maxtouchpoints.testing.value
+  type: int32_t
+  value: -1
+  mirror: always
+
+# Maximum value of navigator.hardwareConcurrency.
+- name: dom.maxHardwareConcurrency
+  type: RelaxedAtomicUint32
+#ifdef NIGHTLY_BUILD
+  value: 128
+#else
+  value: 16
+#endif
+  mirror: always
+
+# W3C pointer events draft.
+- name: dom.w3c_pointer_events.implicit_capture
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.w3c_pointer_events.getcoalescedevents_only_in_securecontext
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# In case Touch API is enabled, this pref controls whether to support
+# ontouch* event handlers, document.createTouch, document.createTouchList and
+# document.createEvent("TouchEvent").
+- name: dom.w3c_touch_events.legacy_apis.enabled
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# W3C touch events
+# 0 - disabled, 1 - enabled, 2 - autodetect
+# Autodetection is currently only supported on Windows and GTK3 (and assumed on
+# Android).
+- name: dom.w3c_touch_events.enabled
+  type: int32_t
+#if defined(XP_MACOSX)
+  value: 0
+#else
+  value: 2
+#endif
+  mirror: always
+
+# Is support for the Web Audio API enabled?
+- name: dom.webaudio.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.webkitBlink.dirPicker.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# Whether allowing selection across the boundary
+# between shadow DOM and light DOM.
+# This is based on https://github.com/mfreed7/shadow-dom-selection
+- name: dom.shadowdom.selection_across_boundary.enabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# When this pref is enabled:
+#  - Shadow DOM is not pierced by default anymore
+#  - The method accepts optional CaretPositionFromPointOptions to allow piercing
+#    certain ShadowRoots
+#
+# https://drafts.csswg.org/cssom-view/#dom-document-caretpositionfrompoint
+- name: dom.shadowdom.new_caretPositionFromPoint_behavior.enabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# NOTE: This preference is used in unit tests. If it is removed or its default
+# value changes, please update test_sharedMap_static_prefs.js accordingly.
+- name: dom.webcomponents.shadowdom.report_usage
+  type: bool
+  value: false
+  mirror: always
+
+# Is support for Declarative ShadowDOM enabled?
+- name: dom.webcomponents.shadowdom.declarative.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for the Web GPU API enabled?
+- name: dom.webgpu.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Is support for the Web GPU API enabled on DOM workers?
+- name: dom.webgpu.workers.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Are WebGPU indirect draws enabled?
+- name: dom.webgpu.indirect-draw.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Comma-separated list of wgpu backend names to permit in WebGPU adapters.
+#
+# If non-empty, this is parsed by `wgpu_core::instance::parse_backends_from_comma_list` to
+# produce a `wgpu_types::Backends` bitset used to create a `wgpu_core::hub::Global`. As of
+# 2023-3-22, recognized names are:
+#
+#     "vulkan" | "vk" => Backends::VULKAN,
+#     "dx12" | "d3d12" => Backends::DX12,
+#     "dx11" | "d3d11" => Backends::DX11,
+#     "metal" | "mtl" => Backends::METAL,
+#     "opengl" | "gles" | "gl" => Backends::GL,
+#     "webgpu" => Backends::BROWSER_WEBGPU,
+- name: dom.webgpu.wgpu-backend
+  type: DataMutexString
+  value: ""
+  mirror: always
+  rust: true
+
+- name: dom.webgpu.allow-present-without-readback
+  type: RelaxedAtomicBool
+#if defined(XP_WIN) || defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# For testing purposes, crash if we don't get a hardware adapter.
+- name: dom.webgpu.testing.assert-hardware-adapter
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Whether to pass labels to the hardware abstraction layer. This is only useful when
+# inspecting a WebGPU workload in a GPU debugging tool like renderdoc. Enabling it
+# exposes poorly tested driver API surfaces so it should not be enabled by default.
+- name: dom.webgpu.hal-labels
+  type: bool
+  value: false
+  mirror: once
+  rust: true
+
+# Is support for HTMLInputElement.webkitEntries enabled?
+- name: dom.webkitBlink.filesystem.enabled
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# Whether the WebMIDI API is enabled
+- name: dom.webmidi.enabled
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# midi permission is addon-gated
+- name: dom.webmidi.gated
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.webnotifications.allowcrossoriginiframe
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: dom.webnotifications.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.webnotifications.privateBrowsing.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.webnotifications.requireuserinteraction
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.webnotifications.requireinteraction.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: @IS_NIGHTLY_BUILD@
+#endif
+  mirror: always
+
+- name: dom.webnotifications.silent.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.webnotifications.vibrate.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Setting log level for notification modules.
+# The value follows the enum ConsoleLogLevel in ConsoleInstance.webidl.
+- name: dom.webnotifications.loglevel
+  type: String
+  value: Error
+  mirror: never
+
+- name: dom.worker.canceling.timeoutMilliseconds
+  type: RelaxedAtomicUint32
+  value: 30000    # 30 seconds
+  mirror: always
+
+# Enables the dispatching of console log events from worker threads to the
+# main-thread.
+- name: dom.worker.console.dispatch_events_to_main_thread
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: dom.workers.testing.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# WebIDL test prefs.
+- name: dom.webidl.test1
+  type: bool
+  value: true
+  mirror: always
+- name: dom.webidl.test2
+  type: bool
+  value: true
+  mirror: always
+
+# WebShare API - exposes navigator.share()
+- name: dom.webshare.enabled
+  type: bool
+#ifdef XP_WIN
+  value: @IS_EARLY_BETA_OR_EARLIER@
+#else
+  value: false
+#endif
+  mirror: always
+
+# WebShare API - allows WebShare without user interaction (for tests only).
+- name: dom.webshare.requireinteraction
+  type: bool
+  value: true
+  mirror: always
+
+# Hide the confirm dialog when a POST request is reloaded.
+- name: dom.confirm_repost.testing.always_accept
+  type: bool
+  value: false
+  mirror: always
+
+# Whether we should suspend inactive tabs or not
+- name: dom.suspend_inactive.enabled
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# The following three prefs control the maximum script run time before slow
+# script warning.
+
+# Controls the time that a content script can run before showing a
+# notification.
+- name: dom.max_script_run_time
+  type: int32_t
+  value: 10
+  mirror: always
+
+# Controls whether we want to wait for user input before surfacing notifying
+# the parent process about a long-running script.
+- name: dom.max_script_run_time.require_critical_input
+  type: bool
+# On desktop, we don't want to annoy the user with a notification if they're
+# not interacting with the browser. On Android however, we automatically
+# terminate long-running scripts, so we want to make sure we don't get in the
+# way of that by waiting for input.
+#if defined(MOZ_WIDGET_ANDROID)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# Controls if a content script will be aborted on child process shutdown.
+- name: dom.abort_script_on_child_shutdown
+  type: bool
+  value: true
+  mirror: always
+
+- name: dom.max_chrome_script_run_time
+  type: int32_t
+  value: 0
+  mirror: always
+
+- name: dom.max_ext_content_script_run_time
+  type: int32_t
+  value: 5
+  mirror: always
+
+# Let Resize Observer report the size of all fragments, and not just the
+# first one, as per CSSWG resolution:
+# https://github.com/w3c/csswg-drafts/issues/3673#issuecomment-467221565
+- name: dom.resize_observer.support_fragments
+  type: bool
+  value: false
+  mirror: always
+
+# Whether allowing using <tab> to move focus to root elements
+- name: dom.disable_tab_focus_to_root_element
+  type: bool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "editor"
+#---------------------------------------------------------------------------
+
+# Default background color of HTML editor.  This is referred only when
+# "editor.use_custom_colors" is set to `true`.
+- name: editor.background_color
+  type: String
+  value: "#FFFFFF"
+  mirror: never
+
+# Delay to mask last input character in password fields.
+# If negative value, to use platform's default behavior.
+# If 0, no delay to mask password.
+# Otherwise, password fields unmask last input character(s) during specified
+# time (in milliseconds).
+- name: editor.password.mask_delay
+  type: int32_t
+  value: -1
+  mirror: always
+
+# Set to true when you test mask_delay of password editor.  If this is set
+# to true, "MozLastInputMasked" is fired when last input characters are
+# masked by timeout.
+- name: editor.password.testing.mask_delay
+  type: bool
+  value: false
+  mirror: always
+
+# How line breakers are treated in single line editor:
+# * 0: Only remove the leading and trailing newlines.
+# * 1: Remove the first newline and all characters following it.
+# * 2: Replace newlines with spaces (default of Firefox).
+# * 3: Remove newlines from the string.
+# * 4: Replace newlines with commas (default of Thunderbird).
+# * 5: Collapse newlines and surrounding white space characters and
+#      remove them from the string.
+# Other values are treated as 1.
+- name: editor.singleLine.pasteNewlines
+  type: int32_t
+  value: 2
+  mirror: always
+
+# Whether user pastes should be truncated.
+- name: editor.truncate_user_pastes
+  type: bool
+  value: true
+  mirror: always
+
+# When this is set to `true`, "editor.background_color" must be set, then,
+# the value is treated as default background color of the HTML editor.
+# If `false` and "browser.display.use_system_colors" is set to `true`,
+# "browser.display.background_color" is used instead.
+# Otherwise, no color is used as default background color.
+# This pref is for Thunderbird and SeaMonkey.
+- name: editor.use_custom_colors
+  type: bool
+  value: false
+  mirror: always
+
+# If this is set to `true`, CSS mode of style editor is enabled by default
+# unless it's a mail editor.
+# This pref is for Thunderbird and SeaMonkey.
+- name: editor.use_css
+  type: bool
+  value: false
+  mirror: always
+
+# Whether enabling blink compatible white-space normalizer or keep using
+# Gecko's traditional white-space normalizer.
+- name: editor.white_space_normalization.blink_compatible
+  type: bool
+  value: false
+  mirror: always
+
+# General prefs for editor, indicating whether Gecko-specific editing UI is
+# enabled by default. Those UIs are not implemented by any other browsers.  So,
+# only Firefox users can change some styles with them. This means that Firefox
+# users may get unexpected result of some web apps if they assume that users
+# cannot change such styles.
+- name: editor.resizing.enabled_by_default
+  type: bool
+  value: false
+  mirror: always
+- name: editor.inline_table_editing.enabled_by_default
+  type: bool
+  value: false
+  mirror: always
+- name: editor.positioning.enabled_by_default
+  type: bool
+  value: false
+  mirror: always
+
+# Controls if a double click word selection also deletes one adjacent whitespace
+# (if feasible). This mimics native behaviour on MacOS.
+- name: editor.word_select.delete_space_after_doubleclick_selection
+  type: bool
+#ifdef XP_MACOSX
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "extensions."
+#---------------------------------------------------------------------------
+
+# Pref that enforces the use of web_accessible_resources for content loads.
+# This behavior is default for MV3.  The pref controls this for MV2.
+- name: extensions.content_web_accessible.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the InstallTrigger implementation should be enabled (or hidden and
+# none of its methods available).
+- name: extensions.InstallTriggerImpl.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the InstallTrigger implementation should be enabled (or completely
+# hidden), separate from InstallTriggerImpl because InstallTrigger is improperly
+# used also for UA detection.
+- name: extensions.InstallTrigger.enabled
+  type: bool
+  value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+
+# Whether the background.service_worker in the extension manifest.json file
+# is enabled.
+# all.js locks the pref to false when MOZ_WEBEXT_WEBIDL_ENABLED is false.
+- name: extensions.backgroundServiceWorker.enabled
+  type: bool
+  value: false
+  mirror: once
+
+# Maximum number of misspelled words in a text.
+- name: extensions.spellcheck.inline.max-misspellings
+  type: int32_t
+  value: 500
+  mirror: always
+
+# Whether the extensions can register a service worker on its own.
+# NOTE: WebExtensions Framework ability to register a background service worker
+# is not controlled by this pref, only the extension code ability to use
+# navigator.serviceWorker.register is locked behind this pref.
+- name: extensions.serviceWorkerRegister.allowed
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, content scripts of MV2 extensions can run in blob:-documents without
+# requiring match_origin_as_fallback to be set, to revert bug 1897113.
+# TODO bug 1899134: Remove this pref.
+- name: extensions.script_blob_without_match_origin_as_fallback
+  type: bool
+  value: false
+  mirror: always
+
+# Legacy behavior on filterResponse calls on intercepted sw script requests.
+- name: extensions.filterResponseServiceWorkerScript.disabled
+  type: bool
+  value: false
+  mirror: always
+
+# This pref governs whether we run webextensions in a separate process (true)
+# or the parent/main process (false)
+- name: extensions.webextensions.remote
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to expose the MockExtensionAPI test interface in tests.
+# The interface MockExtensionAPI doesn't represent a real extension API,
+# it is only available in test and does include a series of cases useful
+# to test the API request handling without tying the unit test to a
+# specific WebExtensions API.
+- name: extensions.webidl-api.expose_mock_interface
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to allow acccess to AddonManager to developer sites for testing
+# NOTE: We'd like this to be a "hidden" pref once StaticPrefs supports it.
+- name: extensions.webapi.testing
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Automation-only pref to allow AddonManager over insecure protocols.
+# NOTE: We'd like this to be a "hidden" pref once StaticPrefs supports it.
+- name: extensions.webapi.testing.http
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to expose the AddonManager web API.
+- name: extensions.webapi.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "fission."
+#---------------------------------------------------------------------------
+
+# Whether to enable Fission in new windows by default.
+# IMPORTANT: This preference should *never* be checked directly, since any
+# session can contain a mix of Fission and non-Fission windows. Instead,
+# callers should check whether the relevant nsILoadContext has the
+# `useRemoteSubframes` flag set.
+# Callers which cannot use `useRemoteSubframes` must use
+# `Services.appinfo.fissionAutostart` or `mozilla::FissionAutostart()` to check
+# whether fission is enabled by default.
+- name: fission.autostart
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: never
+
+# Disable storing the session history in the parent process, and accessing it
+# over IPC from the child processes.
+- name: fission.disableSessionHistoryInParent
+  type: bool
+  value: @IS_ANDROID@
+  mirror: once
+  do_not_use_directly: true
+
+# If session history is stored in the parent process, enable bfcache for it.
+- name: fission.bfcacheInParent
+  type: bool
+  value: true
+  mirror: always
+  do_not_use_directly: true
+
+# Allow renaming of processes from Private Windows to the eTLD+1 on nightly
+# Setting this pref creates a privacy leak, but helps greatly with
+# debugging.
+- name: fission.processPrivateWindowSiteNames
+  type: bool
+  value: false
+  mirror: always
+
+# Allow renaming of process names to the eTLD+1 on all versions, NOT
+# including processes from Private Windows
+# Setting this pref creates a privacy leak, but helps greatly with
+# debugging
+- name: fission.processSiteNames
+  type: bool
+  value: false
+  mirror: always
+
+# Allow showing of current profile along with process names, NOT
+# including processes from Private Windows
+# Setting this pref creates a privacy leak, but helps greatly with
+# debugging
+- name: fission.processProfileName
+  type: bool
+  value: false
+  mirror: always
+
+# The strategy used to control how sites are isolated into separate processes
+# when Fisison is enabled. This pref has no effect if Fission is disabled.
+# See the `WebContentIsolationStrategy` enum in `ProcessIsolation.cpp`.
+- name: fission.webContentIsolationStrategy
+  type: uint32_t
+  value: 1
+  mirror: always
+
+# Time in seconds before a site loaded with the Cross-Origin-Opener-Policy
+# header is no longer considered high-value and isolated in the "highValueCOOP"
+# configuration.
+- name: fission.highValue.coop.expiration
+  type: uint32_t
+  value: 2592000   # 30 days (in seconds)
+  mirror: always
+
+# Time in seconds before a site are considered high-value by the login detection
+# service is no longer considered high-value and isolated in the "highValueHasSavedLogin"
+# or "highValueIsLoggedIn" configuration.
+- name: fission.highValue.login.expiration
+  type: uint32_t
+  value: 2592000   # 30 days (in seconds)
+  mirror: always
+
+# If true, capture login attemp, and add "highValueIsLoggedIn" permission to
+# the permission manager no matter whether fission is enabled and
+# WebContentIsolationStrateg is set to IsolateHighvalue.
+- name: fission.highValue.login.monitor
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# If true, do not send blocklisted preference values to the subprocess
+- name: fission.omitBlocklistedPrefsInSubprocesses
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true, crash when a blocklisted preference is accessed in a subprocess
+- name: fission.enforceBlocklistedPrefsInSubprocesses
+  type: RelaxedAtomicBool
+#ifdef DEBUG
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "font."
+#---------------------------------------------------------------------------
+
+# A value greater than zero enables font size inflation for
+# pan-and-zoom UIs, so that the fonts in a block are at least the size
+# that, if a block's width is scaled to match the device's width, the
+# fonts in the block are big enough that at most the pref value ems of
+# text fit in *the width of the device*.
+#
+# When both this pref and the next are set, the larger inflation is used.
+- name: font.size.inflation.emPerLine
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# A value greater than zero enables font size inflation for
+# pan-and-zoom UIs, so that if a block's width is scaled to match the
+# device's width, the fonts in a block are at least the given font size.
+# The value given is in twips, i.e., 1/20 of a point, or 1/1440 of an inch.
+#
+# When both this pref and the previous are set, the larger inflation is used.
+- name: font.size.inflation.minTwips
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# In products with multi-mode pan-and-zoom and non-pan-and-zoom UIs,
+# this pref forces font inflation to always be enabled in all modes.
+# That is, any heuristics used to detect pan-and-zoom
+# vs. non-pan-and-zoom modes are disabled and all content is treated
+# as pan-and-zoom mode wrt font inflation.
+#
+# This pref has no effect if font inflation is not enabled through
+# either of the prefs above.  It has no meaning in single-mode UIs.
+- name: font.size.inflation.forceEnabled
+  type: bool
+  value: false
+  mirror: always
+
+# In products with multi-mode pan-and-zoom and non-pan-and-zoom UIs,
+# this pref disables font inflation in master-process contexts where
+# existing heuristics can't be used determine enabled-ness.
+#
+# This pref has no effect if font inflation is not enabled through
+# either of the prefs above.  The "forceEnabled" pref above overrides
+# this pref.
+- name: font.size.inflation.disabledInMasterProcess
+  type: bool
+  value: false
+  mirror: always
+
+# Defines the font size inflation mapping intercept parameter.
+#
+# Font size inflation computes a minimum font size, m, based on
+# other preferences (see font.size.inflation.minTwips and
+# font.size.inflation.emPerLine, above) and the width of the
+# frame in which the text resides. Using this minimum, a specified
+# font size, s, is mapped to an inflated font size, i, using an
+# equation that varies depending on the value of the font size
+# inflation mapping intercept parameter, P.
+#
+# If the intercept parameter is negative, then the following mapping
+# function is used:
+#
+# i = m + s
+#
+# If the intercept parameter is non-negative, then the mapping function
+# is a function such that its graph meets the graph of i = s at the
+# point where both i and s are (1 + P/2) * m for values of s that are
+# large enough. This means that when s=0, i is always equal to m.
+- name: font.size.inflation.mappingIntercept
+  type: int32_t
+  value: 1
+  mirror: always
+
+# Since the goal of font size inflation is to avoid having to
+# repeatedly scroll side to side to read a block of text, and there are
+# a number of page layouts where a relatively small chunk of text is
+# better off not being inflated according to the same algorithm we use
+# for larger chunks of text, we want a threshold for an amount of text
+# that triggers font size inflation.  This preference controls that
+# threshold.
+#
+# It controls the threshold used within an *approximation* of the
+# number of lines of text we use.  In particular, if we assume that
+# each character (collapsing collapsible whitespace) has a width the
+# same as the em-size of the font (when, normally, it's actually quite
+# a bit smaller on average), this preference gives the percentage of a
+# number of lines of text we'd need to trigger inflation.  This means
+# that a percentage of 100 means that we'd need a number of characters
+# (we know the font size and the width) equivalent to one line of
+# square text (which is actually a lot less than a real line of text).
+#
+# A value of 0 means there's no character length threshold.
+- name: font.size.inflation.lineThreshold
+  type: uint32_t
+  value: 400
+  mirror: always
+
+# This controls the percentage that fonts will be inflated, if font
+# size inflation is enabled. Essentially, if we have a specified font
+# size, s, and an inflated font size, i, this specifies that the ratio
+# i/s * 100 should never exceed the value of this preference. In order
+# for this preference to have any effect, its value must be greater
+# than 100, since font inflation can never decrease the ratio i/s.
+- name: font.size.inflation.maxRatio
+  type: uint32_t
+  value: 0
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "full-screen-api."
+#---------------------------------------------------------------------------
+
+- name: full-screen-api.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: full-screen-api.allow-trusted-requests-only
+  type: bool
+  value: true
+  mirror: always
+
+- name: full-screen-api.mouse-event-allow-left-button-only
+  type: bool
+  value: true
+  mirror: always
+
+- name: full-screen-api.exit-on.windowOpen
+  type: bool
+  value: true
+  mirror: always
+
+- name: full-screen-api.exit-on.windowRaise
+  type: bool
+  value: true
+  mirror: always
+
+- name: full-screen-api.pointer-lock.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# whether to prevent the top level widget from going fullscreen
+- name: full-screen-api.ignore-widgets
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "fuzzing.". It's important that these can only be
+# checked in fuzzing builds (when FUZZING is defined), otherwise you could
+# enable the fuzzing stuff on your regular build which would be bad :)
+#---------------------------------------------------------------------------
+
+#ifdef FUZZING
+-   name: fuzzing.enabled
+    type: bool
+#ifdef FUZZING_SNAPSHOT
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+
+-   name: fuzzing.necko.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+-   name: fuzzing.necko.http3
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+    rust: true
+
+#ifdef FUZZING_SNAPSHOT
+-   name: fuzzing.snapshot.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#endif
+
+# This configures a virtual authenticator for WebAuthn. The value encodes the
+# arguments to the WebDriver "Add Virtual Authenticator" extension command.
+# Bits 0, 1, 2, and 3 encode "is_user_verified", "is_user_consenting",
+# "has_user_verification", and "has_resident_key" in that order. Bit 5 encodes
+# the transport, either "usb" (0) or "internal" (1). Bits 6 and 7 encode the
+# protocol, either "ctap1/u2f" (1), "ctap2" (2), or "ctap2_1" (3). Note that
+# the valid protocol values are non-zero---an authenticator will not be
+# configured if this pref is set to zero. Changing this pref requires
+# a restart.
+- name: fuzzing.webauthn.authenticator_config
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+  rust: true
+#endif
+
+#---------------------------------------------------------------------------
+# Prefs starting with "general."
+#---------------------------------------------------------------------------
+
+- name: general.aboutConfig.enable
+  type: bool
+  value: true
+  mirror: always
+
+# Limits the depth of recursive conversion of data when opening
+# a content to view.  This is mostly intended to prevent infinite
+# loops with faulty converters involved.
+- name: general.document_open_conversion_depth_limit
+  type: uint32_t
+  value: 20
+  mirror: always
+
+- name: general.smoothScroll
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# This pref and general.smoothScroll.stopDecelerationWeighting determine
+# the timing function.
+- name: general.smoothScroll.currentVelocityWeighting
+  type: AtomicFloat
+  value: 0.25
+  mirror: always
+
+# To connect consecutive scroll events into a continuous flow, the animation's
+# duration should be longer than scroll events intervals (or else the scroll
+# will stop before the next event arrives - we're guessing the next interval
+# by averaging recent intervals).
+# This defines how much longer the duration is compared to the events
+# interval (percentage).
+- name: general.smoothScroll.durationToIntervalRatio
+  type: RelaxedAtomicInt32
+  value: 200
+  mirror: always
+
+- name: general.smoothScroll.lines
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: general.smoothScroll.lines.durationMaxMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.lines.durationMinMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.mouseWheel
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: general.smoothScroll.mouseWheel.durationMaxMS
+  type: RelaxedAtomicInt32
+  value: 200
+  mirror: always
+
+- name: general.smoothScroll.mouseWheel.durationMinMS
+  type: RelaxedAtomicInt32
+  value: 50
+  mirror: always
+
+- name: general.smoothScroll.other
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: general.smoothScroll.other.durationMaxMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.other.durationMinMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.pages
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: general.smoothScroll.pages.durationMaxMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.pages.durationMinMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.scrollbars
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: general.smoothScroll.scrollbars.durationMaxMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.scrollbars.durationMinMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.pixels
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: general.smoothScroll.pixels.durationMaxMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+- name: general.smoothScroll.pixels.durationMinMS
+  type: RelaxedAtomicInt32
+  value: 150
+  mirror: always
+
+# This pref and general.smoothScroll.currentVelocityWeighting determine
+# the timing function.
+- name: general.smoothScroll.stopDecelerationWeighting
+  type: AtomicFloat
+  value: 0.4f
+  mirror: always
+
+# Alternative smooth scroll physics. ("MSD" = Mass-Spring-Damper)
+- name: general.smoothScroll.msdPhysics.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+- name: general.smoothScroll.msdPhysics.continuousMotionMaxDeltaMS
+  type: RelaxedAtomicInt32
+  value: 120
+  mirror: always
+
+- name: general.smoothScroll.msdPhysics.motionBeginSpringConstant
+  type: RelaxedAtomicInt32
+  value: 1250
+  mirror: always
+
+- name: general.smoothScroll.msdPhysics.slowdownMinDeltaMS
+  type: RelaxedAtomicInt32
+  value: 12
+  mirror: always
+
+- name: general.smoothScroll.msdPhysics.slowdownMinDeltaRatio
+  type: AtomicFloat
+  value: 1.3f
+  mirror: always
+
+- name: general.smoothScroll.msdPhysics.slowdownSpringConstant
+  type: RelaxedAtomicInt32
+  value: 2000
+  mirror: always
+
+- name: general.smoothScroll.msdPhysics.regularSpringConstant
+  type: RelaxedAtomicInt32
+  value: 1000
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "geo."
+#---------------------------------------------------------------------------
+
+# Is support for Navigator.geolocation enabled?
+- name: geo.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Time, in milliseconds, to wait for the location provider to spin up.
+- name: geo.timeout
+  type: int32_t
+  value: 6000
+  mirror: always
+
+#ifdef MOZ_ENABLE_DBUS
+# Whether to use Geoclue location provider (if available on the system).
+- name: geo.provider.use_geoclue
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to always provide high location accuracy, even if site
+# doesn't actually request this level of accuracy.
+# Almost no site correctly requests high accuracy so force it by default
+# for compatibility with other geolocation providers.
+- name: geo.provider.geoclue.always_high_accuracy
+  type: bool
+  value: true
+  mirror: always
+
+# Time in milliseconds after which geoclue will try to fallback to MLS if no
+# location is received after successful start.
+- name: geo.provider.geoclue.mls_fallback_timeout_ms
+  type: uint32_t
+  value: 5000
+  mirror: always
+#endif
+
+# If true, open system preferences for the user when geolocation is requested
+# by the user but OS geolocation permission is not available.
+- name: geo.prompt.open_system_prefs
+  type: bool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "gfx."
+#---------------------------------------------------------------------------
+
+# Allow 24-bit colour when the hardware supports it.
+- name: gfx.android.rgb16.force
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.apitrace.enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.blithelper.precision
+  type: RelaxedAtomicUint32
+  value: 2 # { 0: lowp, 1: mediump, 2: highp }
+  mirror: always
+
+- name: gfx.blithelper.lut-size.rgb.b
+  type: RelaxedAtomicUint32
+  value: 15
+  mirror: always
+- name: gfx.blithelper.lut-size.rgb.g
+  type: RelaxedAtomicUint32
+  value: 31
+  mirror: always
+- name: gfx.blithelper.lut-size.rgb.r
+  type: RelaxedAtomicUint32
+  value: 31
+  mirror: always
+
+- name: gfx.blithelper.lut-size.ycbcr.cb
+  type: RelaxedAtomicUint32
+  value: 15
+  mirror: always
+- name: gfx.blithelper.lut-size.ycbcr.cr
+  type: RelaxedAtomicUint32
+  value: 31
+  mirror: always
+- name: gfx.blithelper.lut-size.ycbcr.y
+  type: RelaxedAtomicUint32
+  value: 31
+  mirror: always
+
+# Nb: we ignore this pref on release and beta.
+- name: gfx.blocklist.all
+  type: int32_t
+  value: 0
+  mirror: once
+
+#if defined(XP_DARWIN)
+- name: gfx.cairo_quartz_cg_layer.enabled
+  type: bool
+  value: true
+  mirror: always
+#endif
+
+- name: gfx.canvas.accelerated
+  type: bool
+#if defined(XP_MACOSX) || defined(XP_LINUX) && !defined(ANDROID)
+  value: true
+#elif defined(MOZ_WIDGET_ANDROID)
+  value: true
+#elif defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Whether to attempt to enable Accelerated Canvas2D regardless of blocklisting.
+- name: gfx.canvas.accelerated.force-enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: gfx.canvas.accelerated.async-present
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.canvas.accelerated.cache-items
+  type: RelaxedAtomicUint32
+  value: 8192
+  mirror: always
+
+- name: gfx.canvas.accelerated.cache-size
+  type: RelaxedAtomicUint32
+  value: 256
+  mirror: always
+
+- name: gfx.canvas.accelerated.reserve-empty-cache
+  type: RelaxedAtomicUint32
+  value: 36
+  mirror: always
+
+- name: gfx.canvas.accelerated.max-draw-target-count
+  type: RelaxedAtomicUint32
+  value: 200
+  mirror: always
+
+- name: gfx.canvas.accelerated.max-size
+  type: RelaxedAtomicInt32
+  value: 8192
+  mirror: always
+
+- name: gfx.canvas.accelerated.min-size
+  type: RelaxedAtomicInt32
+  value: 128
+  mirror: always
+
+- name: gfx.canvas.accelerated.max-surface-size
+  type: RelaxedAtomicUint32
+  value: 5280
+  mirror: always
+
+- name: gfx.canvas.accelerated.shared-page-size
+  type: RelaxedAtomicUint32
+  value: 1024
+  mirror: always
+
+# The minimum number of frames before acting on performance profile info
+- name: gfx.canvas.accelerated.profile-frames
+  type: RelaxedAtomicUint32
+  value: 10
+  mirror: always
+
+# The ratio of failed frames to total frames when to fall back from acceleration
+- name: gfx.canvas.accelerated.profile-fallback-ratio
+  type: AtomicFloat
+  value: 0.3
+  mirror: always
+
+# The ratio of cache misses at which to fail a profile frame
+- name: gfx.canvas.accelerated.profile-cache-miss-ratio
+  type: AtomicFloat
+  value: 0.66
+  mirror: always
+
+# The maximum size of the GPU path cache in MB.
+- name: gfx.canvas.accelerated.gpu-path-size
+  type: RelaxedAtomicUint32
+  value: 4
+  mirror: always
+
+# The maximum allowed complexity of a GPU path.
+- name: gfx.canvas.accelerated.gpu-path-complexity
+  type: RelaxedAtomicUint32
+  value: 4000
+  mirror: always
+
+# Whether to accelerate stroked paths by converting them to fill paths.
+- name: gfx.canvas.accelerated.stroke-to-fill-path
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to use aa-stroke to accelerate stroked paths.
+- name: gfx.canvas.accelerated.aa-stroke.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Draws an indicator if acceleration is used.
+- name: gfx.canvas.accelerated.debug
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# 0x7fff is the maximum supported xlib surface size and is more than enough for canvases.
+- name: gfx.canvas.max-size
+  type: RelaxedAtomicInt32
+  value: 0x7fff
+  mirror: always
+
+- name: gfx.canvas.remote
+  type: bool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+- name: gfx.canvas.remote.allow-in-parent
+  type: bool
+  value: false
+  mirror: once
+
+# Whether OffscreenCanvas can use remote canvas
+- name: gfx.canvas.remote.allow-offscreen
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# How many worker threads spawned for remote canvas
+#  -1 - Calculate based on processor cores
+#   0 - No worker threads spawned, will do work on CanvasRenderThread
+#  >0 - Create worker thread pool with given size
+- name: gfx.canvas.remote.worker-threads
+  type: int32_t
+#if defined(XP_WIN)
+  value: -1
+#else
+  value: 0
+#endif
+  mirror: once
+
+# Default size of the shmem buffers used for recording
+- name: gfx.canvas.remote.default-buffer-size
+  type: RelaxedAtomicUint32
+  value: 32 * 1024
+  mirror: always
+
+# Maximum number of Default size shmem buffers to use
+- name: gfx.canvas.remote.max_default_buffers
+  type: RelaxedAtomicUint32
+  value: 256
+  mirror: always
+
+# How many times to spin before waiting in remote canvas
+- name: gfx.canvas.remote.max-spin-count
+  type: RelaxedAtomicUint32
+  value: 500
+  mirror: always
+
+# How long to wait in milliseconds for the next event while in a transaction
+- name: gfx.canvas.remote.event-timeout-ms
+  type: RelaxedAtomicUint32
+  value: 2
+  mirror: always
+
+# How many times we have a spare buffer before we drop one
+- name: gfx.canvas.remote.drop-buffer-limit
+  type: RelaxedAtomicUint32
+  value: 100
+  mirror: always
+
+# Delay in milliseconds to drop buffers when there have been no non-empty transactions
+- name: gfx.canvas.remote.drop-buffer-milliseconds
+  type: RelaxedAtomicUint32
+  value: 10000
+  mirror: always
+
+- name: gfx.canvas.remote.use-draw-image-fast-path
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.canvas.remote.use-draw-image-fast-path-d3d
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.canvas.remote.recycle-used-data-surface
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.canvas.remote.use-canvas-translator-event
+  type: bool
+  value: true
+  mirror: once
+
+- name: gfx.canvas.willreadfrequently.enabled
+  type: bool
+#if defined(XP_WIN)
+  value: false
+#else
+  value: true
+#endif
+  mirror: once
+
+
+- name: gfx.color_management.display_profile
+  type: DataMutexString
+  value: ""
+  mirror: always # But be warned: We cache the result.
+
+- name: gfx.color_management.force_srgb
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.color_management.native_srgb
+  type: RelaxedAtomicBool
+#if defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: gfx.color_management.enablev4
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# 0 = Off, 1 = Full, 2 = Tagged Images Only.
+# See CMSMode in gfx/thebes/gfxPlatform.h.
+- name: gfx.color_management.mode
+  type: RelaxedAtomicInt32
+  value: 2
+  mirror: always
+
+# The zero default here should match QCMS_INTENT_DEFAULT from qcms.h
+- name: gfx.color_management.rendering_intent
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: gfx.color_management.rec709_gamma_as_srgb
+  type: RelaxedAtomicBool
+  value: true # Tragic backwards compat.
+  mirror: always
+
+- name: gfx.color_management.rec2020_gamma_as_rec709
+  type: RelaxedAtomicBool
+  value: true # Match naive behavior, but hopefully we can stop soon!
+  mirror: always
+
+# Whether GL contexts can be migrated to a different GPU (to match the one the
+# OS is using for composition).
+#
+# 0 = force disable migration
+# 1 = use migration where in safe configurations (the default)
+# 2 = force enable migration (for testing)
+- name: gfx.compositor.gpu-migration
+  type: RelaxedAtomicInt32
+  value: 1
+  mirror: always
+
+- name: gfx.core-animation.tint-opaque
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#ifdef XP_DARWIN
+  # Create specialized video-only layers for video content in
+  # fullscreen windows. Consistently works well on Apple Silicon,
+  # some issues remain on Intel hardware.
+-   name: gfx.core-animation.specialize-video
+    type: RelaxedAtomicBool
+#if defined(MOZ_AARCH64)
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+#endif
+
+#if defined(XP_DARWIN) && defined(NIGHTLY_BUILD)
+  # Spoof the timing of the video sample instead of marking the untimed
+  # sample to be displayed immediately.
+-   name: gfx.core-animation.specialize-video.spoof-timing
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+  # Check that the sample has a color space and if it doesn't, log that
+  # and supply the default color space from the main display.
+-   name: gfx.core-animation.specialize-video.check-color-space
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+  # Log properties of the video surface, buffer, and format.
+-   name: gfx.core-animation.specialize-video.log
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+#endif
+
+#ifdef XP_DARWIN
+-   name: gfx.core-animation.low-power-telemetry-frames
+    type: int32_t
+    value: 600
+    mirror: once
+#endif
+
+#if defined(MOZ_WIDGET_ANDROID)
+  # Overrides the glClear color used when the surface origin is not (0, 0)
+  # Used for drawing a border around the content.
+-   name: gfx.compositor.override.clear-color.r
+    type: AtomicFloat
+    value: 0.0f
+    mirror: always
+
+-   name: gfx.compositor.override.clear-color.g
+    type: AtomicFloat
+    value: 0.0f
+    mirror: always
+
+-   name: gfx.compositor.override.clear-color.b
+    type: AtomicFloat
+    value: 0.0f
+    mirror: always
+
+-   name: gfx.compositor.override.clear-color.a
+    type: AtomicFloat
+    value: 0.0f
+    mirror: always
+#endif  # defined(MOZ_WIDGET_ANDROID)
+
+- name: gfx.content.always-paint
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Size in megabytes
+- name: gfx.content.skia-font-cache-size
+  type: int32_t
+  value: 5
+  mirror: once
+
+- name: gfx.device-reset.limit
+  type: int32_t
+  value: 10
+  mirror: once
+
+- name: gfx.device-reset.threshold-ms
+  type: int32_t
+  value: -1
+  mirror: once
+
+
+# Whether to disable the automatic detection and use of direct2d.
+- name: gfx.direct2d.disabled
+  type: bool
+  value: true
+  mirror: once
+
+# Whether to attempt to enable Direct2D regardless of automatic detection or
+# blacklisting.
+- name: gfx.direct2d.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.direct2d.target-independent-rasterization.disabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.direct3d11.reuse-decoder-device
+  type: bool
+  value: true
+  mirror: once
+# Enable reuse decoder device even when it is blocked.
+- name: gfx.direct3d11.reuse-decoder-device-force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.direct3d11.allow-keyed-mutex
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.direct3d11.use-double-buffering
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.direct3d11.enable-debug-layer
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.direct3d11.break-on-error
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.direct3d11.sleep-on-create-device
+  type: int32_t
+  value: 0
+  mirror: once
+
+# Rate by which the frame rate is divided. I.e. at a number higher than 1 we
+# will only refresh every <x> frames.
+- name: gfx.display.frame-rate-divisor
+  type: RelaxedAtomicInt32
+  value: 1
+  mirror: always
+
+- name: gfx.display.max-frame-rate
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Whether to disable downloadable font cache so that behavior is consistently
+# the uncached load behavior across pages (useful for testing reflow problems)
+- name: gfx.downloadable_fonts.disable_cache
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to preserve color bitmap tables in fonts (bypassing OTS).
+# Currently these are supported only on platforms where we use Freetype
+# to render fonts (Linux/Gtk and Android).
+- name: gfx.downloadable_fonts.keep_color_bitmaps
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to validate OpenType variation tables in fonts.
+- name: gfx.downloadable_fonts.validate_variation_tables
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether OTS validation should be applied to OpenType Layout (OTL) tables.
+- name: gfx.downloadable_fonts.otl_validation
+  type: RelaxedAtomicBool
+  value: @IS_NOT_RELEASE_OR_BETA@
+  mirror: always
+
+- name: gfx.e10s.font-list.shared
+  type: bool
+  value: true
+  mirror: once
+
+# Do we fire a notification about missing fonts, so the front-end can decide
+# whether to try and do something about it (e.g. download additional fonts)?
+- name: gfx.missing_fonts.notify
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#if !defined(MOZ_WIDGET_ANDROID)
+- name: gfx.egl.prefer-gles.enabled
+  type: bool
+#if defined(MOZ_WIDGET_GTK) && defined(MOZ_AARCH64)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+#endif
+
+# [Windows] Whether registry FontSubstitutes entries are used unconditionally,
+# or only if the original font is not available.
+#if defined(XP_WIN)
+- name: gfx.windows-font-substitutes.always
+  type: bool
+  value: false
+  mirror: once
+#endif
+
+- name: gfx.font-list-omt.enabled
+  type: bool
+#if defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+# [Android] OPPO, realme and OnePlus device seem to crash when using Font
+# Match API. We turn off this feature on these devices. Set true if you want to
+# turn on it at force.
+#if defined(MOZ_WIDGET_ANDROID)
+- name: gfx.font-list.use_font_match_api.force-enabled
+  type: bool
+  value: false
+  mirror: once
+#endif
+
+# Whether to load fonts (e.g. Twemoji Mozilla) bundled with the application:
+#  -1 - Auto behavior based on OS version (currently, disables loading on
+#       "low-memory" Android devices)
+#   0 - Skip loading any bundled fonts
+#   1 - Always load bundled fonts
+- name: gfx.bundled-fonts.activate
+  type: int32_t
+  value: -1
+  mirror: once
+
+- name: gfx.font_loader.delay
+  type: RelaxedAtomicUint32
+#if defined(XP_WIN)
+  value: 60000
+#else
+  value: 8000
+#endif
+  mirror: always
+
+# Disable antialiasing of Ahem, for use in tests.
+- name: gfx.font_rendering.ahem_antialias_none
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#if defined(XP_DARWIN)
+  # Set to true to revert from HarfBuzz AAT shaping to the old Core Text
+  # backend.
+-   name: gfx.font_rendering.coretext.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+#endif
+
+- name: gfx.font_rendering.colr_v1.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.font_rendering.opentype_svg.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+- name: gfx.font_rendering.fallback.async
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# whether to always search all font cmaps during system font fallback
+- name: gfx.font_rendering.fallback.always_use_cmaps
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# whether to do font fallback for codepoints with General Category = Unassigned
+- name: gfx.font_rendering.fallback.unassigned_chars
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#ifdef MOZ_WIDGET_GTK
+-   name: gfx.font_rendering.fontconfig.max_generic_substitutions
+    type: RelaxedAtomicUint32
+    value: 3
+    mirror: always
+#endif
+
+#if defined(XP_WIN)
+# Whether the DirectWrite bold simulation should be used when a bold font-weight
+# is requested but no bold face available in the family. This renders poorly with
+# some third-party fonts, so by default we disable it for webfonts and allow it
+# only with locally-installed fonts.
+# Values:
+#   0 - never use DWrite bold simulation; always multi-strike instead
+#   1 - use DWrite bold for installed fonts, multi-strike for webfont resources
+#   2 - use DWrite bold for all fonts
+- name: gfx.font_rendering.directwrite.bold_simulation
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+#endif
+
+- name: gfx.font_rendering.graphite.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Cache shaped word results
+- name: gfx.font_rendering.wordcache.charlimit
+  type: RelaxedAtomicUint32
+  value: 32
+  mirror: always
+
+# Cache shaped word results
+- name: gfx.font_rendering.wordcache.maxentries
+  type: RelaxedAtomicUint32
+  value: 10000
+  mirror: always
+
+# The level of logging:
+# - 0: no logging;
+# - 1: adds errors;
+# - 2: adds warnings;
+# - 3 or 4: adds debug logging.
+# If you set the value to 4, you will also need to set the environment
+# variable MOZ_LOG to gfx:4. See mozilla/Logging.h for details.
+- name: gfx.logging.level
+  type: RelaxedAtomicInt32
+  value: mozilla::gfx::LOG_DEFAULT
+  mirror: always
+  include: mozilla/gfx/LoggingConstants.h
+
+- name: gfx.logging.crash.length
+  type: uint32_t
+  value: 16
+  mirror: once
+
+# The maximums here are quite conservative, we can tighten them if problems show up.
+- name: gfx.logging.texture-usage.enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.logging.peak-texture-usage.enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.logging.slow-frames.enabled
+  type: bool
+  value: false
+  mirror: once
+
+# Use gfxPlatform::MaxAllocSize instead of the pref directly.
+- name: gfx.max-alloc-size
+  type: int32_t
+  value: (int32_t)0x7FFFFFFF
+  mirror: once
+  do_not_use_directly: true
+
+# Use gfxPlatform::MaxTextureSize instead of the pref directly.
+- name: gfx.max-texture-size
+  type: int32_t
+  value: (int32_t)32767
+  mirror: once
+  do_not_use_directly: true
+
+- name: gfx.offscreencanvas.shared-provider
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.offscreencanvas.snapshot-timeout-ms
+  type: int32_t
+  value: 10000
+  mirror: always
+
+- name: gfx.omta.background-color
+  type: bool
+  value: true
+  mirror: always
+
+- name: gfx.partialpresent.force
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# SwapInterval
+- name: gfx.swap-interval.glx
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.swap-interval.egl
+  type: RelaxedAtomicBool
+  mirror: always
+#ifdef MOZ_WIDGET_ANDROID
+  value: true
+#else
+  value: false
+#endif
+
+
+# Log severe performance warnings to the error console and profiles.
+# This should be use to quickly find which slow paths are used by test cases.
+- name: gfx.perf-warnings.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#ifdef MOZ_X11
+# Whether to force using GLX over EGL.
+- name: gfx.x11-egl.force-disabled
+  type: bool
+  value: false
+  mirror: once
+
+# Whether to force using EGL over GLX.
+- name: gfx.x11-egl.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.x11.glx_sgi_video_sync
+  type: bool
+  value: false
+  mirror: once
+#endif
+
+- name: gfx.testing.device-fail
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.testing.device-reset
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Meant to be used for tests only. If greater than 0 then we assert that the
+# number of active render textures increases by this amount or less.
+#ifdef DEBUG
+- name: gfx.testing.assert-render-textures-increase
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+#endif
+
+- name: gfx.text.disable-aa
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.text.subpixel-position.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.text.subpixel-position.force-disabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.use-iosurface-textures
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.use-mutex-on-present
+  type: bool
+  value: false
+  mirror: once
+
+# Use SurfaceTextures as preferred backend for TextureClient/Host.
+- name: gfx.use-surfacetexture-textures
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.vsync.compositor.unobserve-count
+  type: int32_t
+  value: 10
+  mirror: once
+
+- name: gfx.vsync.force-disable-waitforvblank
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.will-change.ignore-opacity
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Should we override the blocklist to enable WebGPU?
+- name: gfx.webgpu.ignore-blocklist
+  type: bool
+  value: false
+  mirror: once
+
+# Whether to use the WebRender hardware backend
+- name: gfx.webrender.all
+  type: bool
+  value: false
+  mirror: once
+
+#ifdef XP_WIN
+- name: gfx.webrender.force-angle
+  type: bool
+  value: true
+  mirror: once
+#endif
+
+# WebRender is not enabled when there is no GPU process on window when
+# WebRender uses ANGLE. It is for avoiding that WebGL and WebRender use ANGLE
+# at once. But there is a case that we want to enable WebRender for testing.
+#ifdef XP_WIN
+- name: gfx.webrender.enabled-no-gpu-process-with-angle-win
+  type: bool
+  value: true
+  mirror: once
+#endif
+
+- name: gfx.webrender.svg-filter-effects
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.also-convert-css-filters
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.also-use-for-docshell-fecolormatrix
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.opacity
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.toalpha
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.feblend
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fecolormatrix
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fecomponenttransfer
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fecomposite
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.feconvolvematrix
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fediffuselighting
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fedisplacementmap
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fedropshadow
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.feflood
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fegaussianblur
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.feimage
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.femerge
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.femorphology
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.feoffset
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fespecularlighting
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.fetile
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-filter-effects.feturbulence
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.svg-images
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.svg-shapes
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gfx.webrender.debug.blob.paint-flashing
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.debug.enable-capture
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.webrender.debug.dl.dump-parent
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.debug.dl.dump-content
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.debug.dl.dump-content-serialized
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, we output warning messages when rejecting surface promotion
+# when it has been requested. This is important for color correctness of
+# wide color videos, as well as for GPU performance for all videos.
+- name: gfx.webrender.debug.surface-promotion-logging
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#ifdef MOZ_WIDGET_GTK
+- name: gfx.webrender.reject-software-driver
+  type: bool
+  value: true
+  mirror: once
+#endif
+
+- name: gfx.webrender.debug.highlight-painted-layers
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.debug.slow-cpu-frame-threshold
+  type: AtomicFloat
+  value: 10.0
+  mirror: always
+
+- name: gfx.webrender.late-scenebuild-threshold
+  type: RelaxedAtomicInt32
+  value: 4
+  mirror: always
+
+- name: gfx.webrender.max-filter-ops-per-chain
+  type: RelaxedAtomicUint32
+  value: 64
+  mirror: always
+
+- name: gfx.webrender.batching.lookback
+  type: uint32_t
+  value: 10
+  mirror: always
+
+- name: gfx.webrender.blob-tile-size
+  type: uint32_t
+  value: 256
+  mirror: always
+
+- name: gfx.webrender.batched-upload-threshold
+  type: int32_t
+#if defined(MOZ_WIDGET_ANDROID)
+  value: 262144
+#else
+  value: 65536
+#endif
+  mirror: always
+
+- name: gfx.webrender.compositor
+  type: bool
+#if defined(XP_WIN) || defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+#ifdef NIGHTLY_BUILD
+  # Keep this pref hidden on non-nightly builds to avoid people accidentally
+  # turning it on.
+- name: gfx.webrender.layer-compositor
+  type: bool
+  value: false
+  mirror: once
+#endif
+
+- name: gfx.webrender.scissored-cache-clears.enabled
+  type: bool
+  value: true
+  mirror: once
+
+- name: gfx.webrender.scissored-cache-clears.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.webrender.compositor.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.webrender.compositor.max_update_rects
+  type: uint32_t
+  value: 1
+  mirror: once
+
+- name: gfx.webrender.compositor.surface-pool-size
+  type: uint32_t
+  value: 25
+  mirror: once
+
+# Number of damage rects we can give to the compositor for a new frame with
+# partial present. This controls whether partial present is used or not.
+- name: gfx.webrender.max-partial-present-rects
+  type: uint32_t
+#if defined(XP_WIN) || defined(MOZ_WIDGET_ANDROID) || defined(MOZ_WIDGET_GTK)
+  value: 1
+#else
+  value: 0
+#endif
+  mirror: once
+
+# Whether or not we can reuse the buffer contents using the GL buffer age
+# extension, if supported by the platform. This requires partial present
+# to be used.
+- name: gfx.webrender.allow-partial-present-buffer-age
+  type: bool
+  value: true
+  mirror: once
+
+# Whether or not we should force partial present on.
+- name: gfx.webrender.force-partial-present
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.webrender.enable-gpu-markers
+  type: bool
+#ifdef DEBUG
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+- name: gfx.webrender.enable-item-cache
+  type: bool
+  value: true
+  mirror: once
+
+# Whether or not to fallback from WebRender to Software WebRender.
+- name: gfx.webrender.fallback.software
+  type: bool
+  value: true
+  mirror: once
+
+#ifdef XP_WIN
+  # Use IDCompositionFilterEffect to color manage dcomp surfaces.
+-   name: gfx.webrender.dcomp.color-manage-with-filters
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+  # Whether to use an overlay of hardware decoded video with DirectComposition
+-   name: gfx.webrender.dcomp-video-hw-overlay-win
+    type: bool
+    value: true
+    mirror: once
+  # Enable hardware decoded video overlay even when it is blocked.
+-   name: gfx.webrender.dcomp-video-hw-overlay-win-force-enabled
+    type: bool
+    value: false
+    mirror: once
+  # Whether to use a yuv video overlay layers with DirectComposition
+-   name: gfx.webrender.dcomp-video-yuv-overlay-win
+    type: bool
+    value: false
+    mirror: once
+-   name: gfx.webrender.dcomp-video-vp-scaling-win
+    type: bool
+    value: true
+    mirror: once
+  # Whether to use virtual surfaces, as opposed to each tile owning a surface.
+-   name: gfx.webrender.dcomp-use-virtual-surfaces
+    type: bool
+    value: true
+    mirror: once
+  # Whether to use an overlay of software decoded video with DirectComposition
+-   name: gfx.webrender.dcomp-video-sw-overlay-win
+    type: bool
+    value: true
+    mirror: once
+  # Enable software decoded video overlay even when it is blocked.
+-   name: gfx.webrender.dcomp-video-sw-overlay-win-force-enabled
+    type: bool
+    value: false
+    mirror: once
+-   name: gfx.webrender.dcomp-video-check-slow-present
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+  # Force triple buffering in overlay's video swap chain
+-   name: gfx.webrender.dcomp-video-force-triple-buffering
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+-   name: gfx.webrender.dcomp-video-swap-chain-present-interval-0
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+-   name: gfx.video.convert-yuv-to-nv12.image-host-win
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#endif
+
+# Whether or not fallback to Software WebRender requires the GPU process.
+- name: gfx.webrender.fallback.software.requires-gpu-process
+  type: bool
+  value: false
+  mirror: once
+
+- name: gfx.webrender.program-binary-disk
+  type: bool
+#if defined(XP_WIN) || defined(ANDROID)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+- name: gfx.webrender.use-optimized-shaders
+  type: bool
+  value: true
+  mirror: once
+
+- name: gfx.webrender.precache-shaders
+  type: bool
+  value: false
+  mirror: once
+
+# When gl debug message is a high severity message, forwward it to gfx critical
+# note.
+- name: gfx.webrender.gl-debug-message-critical-note
+  type: bool
+#if defined(XP_WIN) && defined(NIGHTLY_BUILD)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+# Enable printing gl debug messages
+- name: gfx.webrender.gl-debug-message-print
+  type: bool
+  value: false
+  mirror: once
+
+#ifdef NIGHTLY_BUILD
+  # Keep this pref hidden on non-nightly builds to avoid people accidentally
+  # turning it on.
+- name: gfx.webrender.panic-on-gl-error
+  type: bool
+  value: false
+  mirror: once
+#endif
+
+#ifdef XP_WIN
+  # Enables display of performance debugging counters when DirectComposition
+  # is used.
+  # Performance counters are displayed on the top-right corner of the screen.
+-   name: gfx.webrender.debug.dcomp-counter
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+  # Enables highlighting redraw regions of DCompositionVisual
+-   name: gfx.webrender.debug.dcomp-redraw-regions
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+#endif
+
+#ifdef XP_DARWIN
+  # Files show up in $HOME/Desktop/nativelayerdumps-PID/frame-123.html
+-   name: gfx.webrender.debug.dump-native-layer-tree-to-file
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+#endif
+
+- name: gfx.webrender.enable-low-priority-pool
+  type: RelaxedAtomicBool
+#if defined(ANDROID)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+  # Force subpixel anti-aliasing as much as possible, despite performance cost.
+- name: gfx.webrender.quality.force-subpixel-aa-where-possible
+  type: bool
+  value: false
+  mirror: always
+
+- name: gfx.webrender.enable-subpixel-aa
+  type: bool
+  mirror: once
+#ifdef MOZ_WIDGET_ANDROID
+  value: false
+#else
+  value: true
+#endif
+
+#ifdef XP_MACOSX
+- name: gfx.webrender.enable-client-storage
+  type: bool
+  value: true
+  mirror: once
+#endif
+
+ # Width of WebRender tile size
+- name: gfx.webrender.picture-tile-width
+  type: RelaxedAtomicInt32
+  value: 1024
+  mirror: always
+
+ # Width of WebRender tile size
+- name: gfx.webrender.picture-tile-height
+  type: RelaxedAtomicInt32
+  value: 512
+  mirror: always
+
+# WebRender upper bound for shared surface size
+# According to apitrace, textures larger than 2048 break fast clear
+# optimizations on some intel drivers. We sometimes need to go larger, but
+# we try to avoid it.
+- name: gfx.webrender.max-shared-surface-size
+  type: int32_t
+  value: 2048
+  mirror: once
+
+# Whether to use EGL robustness or not.
+- name: gfx.webrender.prefer-robustness
+  type: bool
+#if defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+# Whether to use the WebRender software backend
+- name: gfx.webrender.software
+  type: bool
+  value: false
+  mirror: once
+
+# Whether to use the D3D11 RenderCompositor when using WebRender software backend
+- name: gfx.webrender.software.d3d11
+  type: bool
+  value: true
+  mirror: once
+
+- name: gfx.webrender.software.opengl
+  type: bool
+#if defined(MOZ_WIDGET_ANDROID)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+- name: gfx.webrender.software.d3d11.upload-mode
+  type: RelaxedAtomicInt32
+  value: 4
+  mirror: always
+
+# Whether to force widgets to don't support acceleration to use WebRender
+# despite that
+- name: gfx.webrender.unaccelerated-widget.force
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Enable a lower quality, but higher performance pinch-zoom mode. Primarily
+# for devices with weak GPUs, or when running SWGL.
+- name: gfx.webrender.low-quality-pinch-zoom
+  type: bool
+#if defined(MOZ_WIDGET_ANDROID) && defined(NIGHTLY_BUILD)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+# Disable wait of GPU execution completion
+- name: gfx.webrender.wait-gpu-finished.disabled
+  type: bool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+# Enable VideoProcessor Super Resolution for video overlay
+- name: gfx.webrender.overlay-vp-super-resolution
+  type: bool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+# Enable VideoProcessor-HDR on SDR content for video overlay
+- name: gfx.webrender.overlay-vp-auto-hdr
+  type: bool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+# Enable a dedicated arena on frame builder threads.
+- name: gfx.webrender.frame-builder-thread-local-arena
+  type: bool
+  rust: true
+  value: false
+  mirror: once
+
+# Enable a dedicated arena on scene builder threads.
+- name: gfx.webrender.scene-builder-thread-local-arena
+  type: bool
+  rust: true
+  value: false
+  mirror: once
+
+# Enable a dedicated arena on WebRender worker threads.
+- name: gfx.webrender.worker-thread-local-arena
+  type: bool
+  rust: true
+  value: true
+  mirror: once
+
+# Use vsync events generated by hardware
+- name: gfx.work-around-driver-bugs
+  type: bool
+  value: true
+  mirror: once
+
+- name: gfx.ycbcr.accurate-conversion
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.remote-texture.recycle.disabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gfx.remote-texture.wait-owner-at-image-host
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "gl." (OpenGL)
+#---------------------------------------------------------------------------
+
+- name: gl.allow-high-power
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: gl.ignore-dx-interop2-blacklist
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: gl.use-tls-is-current
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "html5."
+#---------------------------------------------------------------------------
+
+# Time in milliseconds between the time a network buffer is seen and the timer
+# firing when the timer hasn't fired previously in this parse in the
+# off-the-main-thread HTML5 parser.
+- name: html5.flushtimer.initialdelay
+  type: RelaxedAtomicInt32
+  value: 16
+  mirror: always
+
+# Time in milliseconds between the time a network buffer is seen and the timer
+# firing when the timer has already fired previously in this parse.
+- name: html5.flushtimer.subsequentdelay
+  type: RelaxedAtomicInt32
+  value: 16
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "idle_period."
+#---------------------------------------------------------------------------
+
+- name: idle_period.min
+  type: uint32_t
+  value: 3
+  mirror: always
+
+- name: idle_period.during_page_load.min
+  type: uint32_t
+  value: 12
+  mirror: always
+
+- name: idle_period.cross_process_scheduling
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "image."
+#---------------------------------------------------------------------------
+
+# The maximum size (in kB) that the aggregate frames of an animation can use
+# before it starts to discard already displayed frames and redecode them as
+# necessary.
+- name: image.animated.decode-on-demand.threshold-kb
+  type: RelaxedAtomicUint32
+  value: 20*1024
+  mirror: always
+
+# The minimum number of frames we want to have buffered ahead of an
+# animation's currently displayed frame.
+- name: image.animated.decode-on-demand.batch-size
+  type: RelaxedAtomicUint32
+  value: 6
+  mirror: always
+
+# Whether we should recycle already displayed frames instead of discarding
+# them. This saves on the allocation itself, and may be able to reuse the
+# contents as well. Only applies if generating full frames.
+- name: image.animated.decode-on-demand.recycle
+  type: bool
+  value: true
+  mirror: once
+
+# Resume an animated image from the last displayed frame rather than
+# advancing when out of view.
+- name: image.animated.resume-from-last-displayed
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Maximum number of surfaces for an image before entering "factor of 2" mode.
+# This in addition to the number of "native" sizes of an image. A native size
+# is a size for which we can decode a frame without up or downscaling. Most
+# images only have 1, but some (i.e. ICOs) may have multiple frames for the
+# same data at different sizes.
+- name: image.cache.factor2.threshold-surfaces
+  type: RelaxedAtomicInt32
+  value: 4
+  mirror: always
+
+# Maximum size of a surface in KB we are willing to produce when rasterizing
+# an SVG.
+- name: image.cache.max-rasterized-svg-threshold-kb
+  type: RelaxedAtomicInt32
+  value: 200*1024
+  mirror: always
+
+# The maximum size, in bytes, of the decoded images we cache.
+- name: image.cache.size
+  type: int32_t
+  value: 5*1024*1024
+  mirror: once
+
+# A weight, from 0-1000, to place on time when comparing to size.
+# Size is given a weight of 1000 - timeweight.
+- name: image.cache.timeweight
+  type: int32_t
+  value: 500
+  mirror: once
+
+# Decode all images automatically on load, ignoring our normal heuristics.
+- name: image.decode-immediately.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Decode all images synchronously, intended to be used for reftests.
+- name: image.testing.decode-sync.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether we attempt to downscale images during decoding.
+- name: image.downscale-during-decode.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we use EXIF metadata for image density.
+- name: image.exif-density-correction.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether EXIF density metadata is sanity checked against PixelXDimension and PixelYDimension
+- name: image.exif-density-correction.sanity-check.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The threshold for inferring that changes to an <img> element's |src|
+# attribute by JavaScript represent an animation, in milliseconds. If the |src|
+# attribute is changing more frequently than this value, then we enter a
+# special "animation mode" which is designed to eliminate flicker. Set to 0 to
+# disable.
+- name: image.infer-src-animation.threshold-ms
+  type: RelaxedAtomicUint32
+  value: 2000
+  mirror: always
+
+# Whether the network request priority should be adjusted according
+# the layout and view frame position of each particular image.
+- name: image.layout_network_priority
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Chunk size for calls to the image decoders.
+- name: image.mem.decode_bytes_at_a_time
+  type: uint32_t
+  value: 16384
+  mirror: once
+
+# Discards inactive image frames and re-decodes them on demand from
+# compressed data.
+- name: image.mem.discardable
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Discards inactive image frames of _animated_ images and re-decodes them on
+# demand from compressed data. Has no effect if image.mem.discardable is false.
+- name: image.mem.animated.discardable
+  type: bool
+  value: true
+  mirror: once
+
+# Enable extra information for debugging in the image memory reports.
+- name: image.mem.debug-reporting
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Force unmapping of unused shared surfaces after a timeout period or when we
+# encounter virtual memory pressure. By default this is only enabled on 32-bit
+# Firefox.
+- name: image.mem.shared.unmap.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+# Minimum timeout to unmap shared surfaces since they have been last used,
+# in milliseconds.
+- name: image.mem.shared.unmap.min_expiration_ms
+  type: uint32_t
+  value: 60*1000
+  mirror: once
+
+# Mininum size for shared surfaces to consider unmapping, in kilobytes.
+- name: image.mem.shared.unmap.min_threshold_kb
+  type: uint32_t
+  value: 100
+  mirror: once
+
+# How much of the data in the surface cache is discarded when we get a memory
+# pressure notification, as a fraction. The discard factor is interpreted as a
+# reciprocal, so a discard factor of 1 means to discard everything in the
+# surface cache on memory pressure, a discard factor of 2 means to discard half
+# of the data, and so forth. The default should be a good balance for desktop
+# and laptop systems, where we never discard visible images.
+- name: image.mem.surfacecache.discard_factor
+  type: uint32_t
+  value: 1
+  mirror: once
+
+# Maximum size for the surface cache, in kilobytes.
+- name: image.mem.surfacecache.max_size_kb
+  type: uint32_t
+  value: 2024 * 1024
+  mirror: once
+
+# Minimum timeout for expiring unused images from the surface cache, in
+# milliseconds. This controls how long we store cached temporary surfaces.
+- name: image.mem.surfacecache.min_expiration_ms
+  type: uint32_t
+  value: 60*1000
+  mirror: once
+
+# The surface cache's size, within the constraints of the maximum size set
+# above, is determined as a fraction of main memory size. The size factor is
+# interpreted as a reciprocal, so a size factor of 4 means to use no more than
+# 1/4 of main memory.  The default should be a good balance for most systems.
+- name: image.mem.surfacecache.size_factor
+  type: uint32_t
+  value: 4
+  mirror: once
+
+# Maximum size in kilobytes that we allow to allocate an imgFrame, meant for
+# testing/fuzzing purposes. -1 disables this limit (there are other limits in
+# place).
+- name: image.mem.max_legal_imgframe_size_kb
+  type: RelaxedAtomicInt32
+  value: -1
+  mirror: always
+
+# Whether we record SVG images as blobs or not.
+- name: image.svg.blob-image
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to set the incremental attribute in the Priority header for images
+- name: image.priority.incremental
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we attempt to decode AVIF images or not.
+- name: image.avif.enabled
+  type: RelaxedAtomicBool
+#if defined(MOZ_AV1)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# How strict we are in accepting/rejecting AVIF inputs according to whether they
+# conform to the specification
+# 0 = Permissive: accept whatever we can simply, unambiguously interpret
+# 1 = Normal: reject violations of "shall" specification directives
+# 2 = Strict: reject violations of "should" specification directives
+- name: image.avif.compliance_strictness
+  type: RelaxedAtomicInt32
+  value: 1
+  mirror: always
+
+# Whether we apply container-level transforms like mirroring and rotation
+- name: image.avif.apply_transforms
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we use dav1d (true) or libaom (false) to decode AVIF image
+- name: image.avif.use-dav1d
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to allow decoding of animated AVIF sequences.
+- name: image.avif.sequence.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether AVIF files containing sequences should be animated even when the
+# major brand is set to 'avif'.
+- name: image.avif.sequence.animate_avif_major_branded_images
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether we attempt to decode JXL images or not.
+- name: image.jxl.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "intl."
+#---------------------------------------------------------------------------
+
+#ifdef XP_WIN
+  # Whether making Gecko TSF-aware or only working with IMM.  TSF is a modern
+  # IME API set of Windows which replaces IMM APIs.  Unless you can avoid the
+  # problem which you see with enabling TSF, you shouldn't change this pref
+  # to false since IMM handler is now not maintained nor tested with latest
+  # Windows.  If you need to change this pref to false, please file a bug to
+  # <https://bugzilla.mozilla.org>.
+  # Restart required to apply this pref change.
+-   name: intl.tsf.enabled
+    type: bool
+    value: true
+    mirror: once
+
+  # Whether Gecko creates or does not create native caret for legacy ATOK
+  # (2011 - 2015).
+-   name: intl.tsf.hack.atok.create_native_caret
+    type: bool
+    value: true
+    mirror: always
+
+  # Without this my windows build crashes
+-   name: "intl.compare_against_brokered_complex_line_breaks"
+    type: bool
+    value: false
+    mirror: always  
+
+  # Whether Gecko returns available composition string rect or TS_E_NOLAYOUT
+  # from ITextStoreACP::GetTextExt() when the specified range is same as the
+  # range of composition string but some character rects in it are still
+  # dirty if and only if ATOK is active TIP.
+  # Note that this is ignored if active ATOK is or older than 2016 and
+  # create_native_caret is true.
+-   name: intl.tsf.hack.atok.do_not_return_no_layout_error_of_composition_string
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Gecko sets input scope of ATOK to "search" or never does it.
+  # When "search" is set to the input scope, ATOK may stop their suggestions.
+  # To avoid it, turn this pref on, or changing the settings in ATOK.
+  # Note that if you enable this pref and you use the touch keyboard for touch
+  # screens, you cannot access some specific features for a "search" input
+  # field.
+-   name: intl.tsf.hack.atok.search_input_scope_disabled
+    type: bool
+    value: false
+    mirror: always
+
+  # Whether Gecko returns caret rect before composition string or TS_E_NOLAYOUT
+  # from ITextStoreACP::GetTextExt() when the specified range is larger than
+  # composition start offset if and only if Free ChangJie is active TIP.
+-   name: intl.tsf.hack.free_chang_jie.do_not_return_no_layout_error
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Gecko returns available composition string rect or TS_E_NOLAYOUT
+  # from ITextStoreACP::GetTextExt() when the specified range is same as the
+  # range of composition string but some character rects in it are still
+  # dirty if and only if Japanist 10 is active TIP.
+-   name: intl.tsf.hack.japanist10.do_not_return_no_layout_error_of_composition_string
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Gecko returns previous character rect or TS_E_NOLAYOUT from
+  # ITfContextView::GetTextExt() when the specified range is the first
+  # character of selected clause of composition string if and only if Japanese TIP
+  # of Microsoft is active.
+-   name: intl.tsf.hack.ms_japanese_ime.do_not_return_no_layout_error_at_first_char
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Gecko returns previous character rect or TS_E_NOLAYOUT from
+  # ITfContextView::GetTextExt() when the specified range is the caret of
+  # composition string if and only if Japanese TIP of Microsoft is active.
+-   name: intl.tsf.hack.ms_japanese_ime.do_not_return_no_layout_error_at_caret
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Gecko returns caret rect before composition string or TS_E_NOLAYOUT
+  # from ITfContextView::GetTextExt() when the specified range is larger than
+  # composition start offset if and only Simplified Chinese TIP of Microsoft
+  # is active.
+-   name: intl.tsf.hack.ms_simplified_chinese.do_not_return_no_layout_error
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Geckos hacks ITextStoreACP::QueryInsert() or not.  The method should
+  # return new selection after specified length text is inserted at specified
+  # range.  However, Microsoft Pinyin and Microsoft Wubi expect that the result
+  # is same as specified range.  If following prefs are true,
+  # ITextStoreACP::QueryInsert() returns specified range only when one of the
+  # TIPs is active.
+-   name: intl.tsf.hack.ms_simplified_chinese.query_insert_result
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Gecko returns caret rect before composition string or TS_E_NOLAYOUT
+  # from ITfContextView::GetTextExt() when the specified range is larger than
+  # composition start offset if and only Traditional Chinese TIP of Microsoft
+  # is active.
+-   name: intl.tsf.hack.ms_traditional_chinese.do_not_return_no_layout_error
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Geckos hacks ITextStoreACP::QueryInsert() or not.  The method should
+  # return new selection after specified length text is inserted at specified
+  # range.  However, Microsoft ChangJie and Microsoft Quick expect that the
+  # result is same as specified range.  If following prefs are true,
+  # ITextStoreACP::QueryInsert() returns specified range only when one of the
+  # TIPs is active.
+-   name: intl.tsf.hack.ms_traditional_chinese.query_insert_result
+    type: bool
+    value: true
+    mirror: always
+
+  # Whether Gecko sets input scope of the URL bar to IS_DEFAULT when black
+  # listed IMEs are active or does not.  If you use tablet mode mainly and you
+  # want to use touch keyboard for URL when you set focus to the URL bar, you
+  # can set this to false.  Then, you'll see, e.g., ".com" key on the keyboard.
+  # However, if you set this to false, such IMEs set its open state to "closed"
+  # when you set focus to the URL bar.  I.e., input mode is automatically
+  # changed to English input mode.
+  # Known buggy IME list:
+  #   - Microsoft IME for Japanese
+  #   - Google Japanese Input
+  #   - Microsoft Bopomofo
+  #   - Microsoft ChangJie
+  #   - Microsoft Phonetic
+  #   - Microsoft Quick
+  #   - Microsoft New ChangJie
+  #   - Microsoft New Phonetic
+  #   - Microsoft New Quick
+  #   - Microsoft Pinyin
+  #   - Microsoft Pinyin New Experience Input Style
+  #   - Microsoft Wubi
+  #   - Microsoft IME for Korean (except on Win7)
+  #   - Microsoft Old Hangul
+-   name: intl.ime.hack.set_input_scope_of_url_bar_to_default
+    type: bool
+    value: true
+    mirror: always
+
+  # On Windows 10 Build 17643 (an Insider Preview build of RS5), Microsoft
+  # have fixed the caller of ITextACPStore::GetTextExt() to return
+  # TS_E_NOLAYOUT to TIP as-is, rather than converting to E_FAIL.
+  # Therefore, if TIP supports asynchronous layout computation perfectly, we
+  # can return TS_E_NOLAYOUT and TIP waits next OnLayoutChange()
+  # notification.  However, some TIPs still have some bugs of asynchronous
+  # layout support.  We keep hacking the result of GetTextExt() like running
+  # on Windows 10, however, there could be unknown TIP bugs if we stop
+  # hacking the result.  So, user can stop checking build ID to make Gecko
+  # hack the result forcibly.
+-   name: intl.tsf.hack.allow_to_stop_hacking_on_build_17643_or_later
+    type: bool
+    value: @IS_EARLY_BETA_OR_EARLIER@
+    mirror: always
+
+  # If true, automatically extend selection to cluster boundaries when
+  # TSF/TIP requests to select from/by middle of a cluster.
+-   name: intl.tsf.hack.extend_setting_selection_range_to_cluster_boundaries
+    type: bool
+    value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+    mirror: always
+
+  # Whether Gecko supports IMM even if TSF is enabled.  This pref exists
+  # only for check TSF behavior of new versions.  Therefore, users should
+  # not set this to false for daily use.
+-   name: intl.tsf.support_imm
+    type: bool
+    value: true
+    mirror: once
+
+  # If true, TSF and TIP (IME) can retrieve URL of the document containing
+  # the focused element.  When this is set to true, Gecko exposes the spec
+  # of the URL.
+  # And Gecko exposes only "http" and "https" URLs.  E.g., "data", "blob",
+  # "file" URLs are never exposed.
+-  name: intl.tsf.expose_url.allowed
+   type: bool
+   value: true
+   mirror: always
+
+  # If true, TSF and TIP (IME) can retrieve URL of the document containing
+  # the focused element in the private browsing mode too.
+-  name: intl.tsf.expose_url_in_private_browsing.allowed
+   type: bool
+   value: false
+   mirror: always
+
+#if defined(ENABLE_TESTS)
+  # If true, NS_GetComplexLineBreaks compares the line breaks produced in the
+  # content process using the Uniscribe line breaker, with those from a
+  # brokered call to the parent.
+-   name: intl.compare_against_brokered_complex_line_breaks
+    type: bool
+    value: false
+    mirror: always
+#endif
+#endif
+
+# If you use legacy Chinese IME which puts an ideographic space to composition
+# string as placeholder, this pref might be useful.  If this is true and when
+# web contents forcibly commits composition (e.g., moving focus), the
+# ideographic space will be ignored (i.e., commits with empty string).
+- name: intl.ime.remove_placeholder_character_at_commit
+  type: bool
+  value: false
+  mirror: always
+
+
+#if defined(XP_MACOSX) || defined(MOZ_WIDGET_GTK) || defined(ANDROID)
+# Whether text input without keyboard press nor IME composition should cause a
+# set of composition events or not.  E.g., when you use Emoji picker on macOS,
+# it inserts an Emoji character directly.  If set to true, `compositionstart`,
+# `compositionupdate` and `compositionend` events will be fired, and the
+# correspnding `beforeinput` events are not cancelable.  Otherwise, if set to
+# false, any user input events are not exposed to web apps but only
+# `beforeinput` event is fired as "insert text" as a cancelable event.
+- name: intl.ime.use_composition_events_for_insert_text
+  type: bool
+  value: false
+  mirror: always
+#endif
+
+# If true, we use UAX14/29 compatible segmenter rules using ICU4X
+- name: intl.icu4x.segmenter.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "javascript."
+#
+# NOTE: SpiderMonkey starts up before `mirror: once` preferences are sealed and
+#       we cannot use them (Bug 1698311). Instead, we use `mirror: always`
+#       prefs but mark as `do_not_use_directly` and `LoadStartupJSPrefs` will
+#       mirror them into SpiderMonkey.
+#---------------------------------------------------------------------------
+
+# The JavaScript JIT compilers. These are read once on startup so a browser may
+# need to be restarted if toggling them. In general each subsequent JIT depends
+# on the ones before it being enabled.
+- name: javascript.options.blinterp
+  type: bool
+  value: true
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+- name: javascript.options.baselinejit
+  type: bool
+  value: true
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+- name: javascript.options.ion
+  type: bool
+  value: true
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+# The irregexp JIT for regex evaluation.
+- name: javascript.options.native_regexp
+  type: bool
+  value: true
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+# Jit Hints Cache - An in-process cache for the
+# content process to accelerate repeated baseline
+# compilations
+- name: javascript.options.jithints
+  type: bool
+  value: true
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+# "Warm-up" thresholds at which we attempt to compile a script/function with
+# the next JIT tier.
+#
+# NOTE: These must match JitOptions defaults.
+- name: javascript.options.blinterp.threshold
+  type: int32_t
+  value: 10
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+- name: javascript.options.baselinejit.threshold
+  type: int32_t
+  value: 100
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+- name: javascript.options.ion.threshold
+  type: int32_t
+  value: 1500
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+#ifdef NIGHTLY_BUILD
+# Experimental support for off-main-thread baseline compilation.
+- name: javascript.options.experimental.baselinejit.offthread_compilation
+  type: bool
+  value: false
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+#endif
+
+# Enable off-main-thread Warp compilation.
+- name: javascript.options.ion.offthread_compilation
+  type: bool
+  value: true
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+#ifdef DEBUG
+  # Enable extra correctness checks in the JITs that are slow and only available
+  # in debug builds.
+-   name: javascript.options.jit.full_debug_checks
+    type: bool
+    value: false
+    mirror: always  # LoadStartupJSPrefs
+    do_not_use_directly: true
+#endif
+
+# Heuristic threshold for Warp/Ion to decide that too many bailouts are
+# happening and an IonScript should be discarded.
+#
+# NOTE: This must match JitOptions defaults.
+- name: javascript.options.ion.frequent_bailout_threshold
+  type: int32_t
+  value: 10
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+# A threshold for Warp to decide whether a function can be inlined.
+# If the size of a function is smaller than this threshold, then it
+# may be inlined.
+#
+# NOTE: These must match JitOptions defaults.
+- name: javascript.options.inlining_bytecode_max_length
+  type: uint32_t
+  value: 130
+  mirror: always
+  do_not_use_directly: true
+
+- name: javascript.options.compact_on_user_inactive
+  type: bool
+  value: true
+  mirror: always
+
+# No-op pref for testing the SpiderMonkey pref system.
+- name: javascript.options.tests.uint32-pref
+  type: uint32_t
+  value: 1
+  mirror: always
+  set_spidermonkey_pref: always
+
+# Enable fuse based destructuring
+- name: javascript.options.destructuring_fuse
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# The default amount of time to wait from the user being idle to starting a
+# shrinking GC. Measured in milliseconds.
+- name: javascript.options.compact_on_user_inactive_delay
+  type: uint32_t
+#ifdef NIGHTLY_BUILD
+  value: 15000
+#else
+  value: 300000
+#endif
+  mirror: always
+
+# Use the realm local dom alloc site.
+- name: javascript.options.dom_alloc_site
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: always
+
+# Use better error message when accessing property of null or undefined.
+- name: javascript.options.property_error_message_fix
+  type: bool
+  value: @IS_NIGHTLY_OR_DEV_EDITION@
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Support for weak references in JavaScript (WeakRef and FinalizationRegistry).
+- name: javascript.options.weakrefs
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Whether to expose the FinalizationRegistry.prototype.cleanupSome method.
+- name: javascript.options.experimental.weakrefs.expose_cleanupSome
+  type: bool
+  value: false
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# ShadowRealms: https://github.com/tc39/proposal-shadowrealm
+- name: javascript.options.experimental.shadow_realms
+  # Atomic, as we assert the preference, and that assertion may happen
+  # in a worker.
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  # Non-startup pref because the WPT test harness sets prefs after startup.
+  set_spidermonkey_pref: always
+
+# Support for String.prototype.{is,to}WellFormed in JavaScript.
+- name: javascript.options.well_formed_unicode_strings
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Support for Object.groupBy/Map.groupBy in JavaScript.
+- name: javascript.options.array_grouping
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for ArrayBuffer.prototype.transfer{,ToFixedLength}() in JavaScript.
+- name: javascript.options.arraybuffer_transfer
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for New Set methods
+- name: javascript.options.experimental.new_set_methods
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for resizable ArrayBuffers in JavaScript.
+- name: javascript.options.experimental.arraybuffer_resizable
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for growable SharedArrayBuffers in JavaScript.
+- name: javascript.options.experimental.sharedarraybuffer_growable
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for Duplicate Named Capture Groups in JavaScript.
+- name: javascript.options.experimental.regexp_duplicate_named_groups
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for Float16Array in JavaScript.
+- name: javascript.options.experimental.float16array
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for Pattern Modifiers in JavaScript.
+- name: javascript.options.experimental.regexp_modifiers
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for Uint8Array base64/hex in JavaScript.
+- name: javascript.options.experimental.uint8array_base64
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for Promise.try in JavaScript.
+- name: javascript.options.experimental.promise_try
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+# Experimental support for RegExp.escape in JavaScript.
+- name: javascript.options.experimental.regexp_escape
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: startup
+
+#ifdef NIGHTLY_BUILD
+  # Experimental support for Async Iterator Helpers in JavaScript.
+-   name: javascript.options.experimental.async_iterator_helpers
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
+
+  # Experimental support for Symbols as WeakMap keys in JavaScript.
+-   name: javascript.options.experimental.symbols_as_weakmap_keys
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
+
+  # Experimental support for Import Assertions in JavaScript.
+-   name: javascript.options.experimental.import_attributes
+    type: bool
+    value: false
+    mirror: always
+
+  # Experimental support for Error.isError in JavaScript.
+-   name: javascript.options.experimental.error_iserror
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: always
+
+  # Experimental support for Math.sumPrecise in JavaScript.
+-   name: javascript.options.experimental.math_sumprecise
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
+
+  # Experimental support for Iterator.range in JavaScript.
+-   name: javascript.options.experimental.iterator_range
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
+
+  # Experimental support for Joint Iteration in JavaScript.
+-   name: javascript.options.experimental.joint_iteration
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
+
+  # Experimental support for Atomics.pause in JavaScript.
+-   name: javascript.options.experimental.atomics_pause
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
+
+  # Experimental support for Iterator Sequencing in JavaScript.
+-   name: javascript.options.experimental.iterator_sequencing
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
+
+#endif  // NIGHTLY_BUILD
+
+#ifdef JS_HAS_TEMPORAL_API
+  # Experimental support for Temporal in JavaScript.
+- name: javascript.options.experimental.temporal
+  type: bool
+  value: false
+  mirror: always
+  set_spidermonkey_pref: startup
+#endif  // JS_HAS_TEMPORAL_API
+
+#ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
+  # Experimental support for Explicit Resource Management in JavaScript.
+-   name: javascript.options.experimental.explicit_resource_management
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: always
+#endif  // ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
+
+- name: javascript.options.experimental.error_capture_stack_trace
+  type: bool
+  value: false
+  mirror: always
+  set_spidermonkey_pref: always
+
+- name: javascript.options.experimental.json_parse_with_source
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: always
+
+- name: javascript.options.wasm_caching
+  type: bool
+  value: true
+  mirror: always
+
+# The amount of time we wait between a request to GC (due to leaving a page) and doing the actual GC, in ms.
+- name: javascript.options.gc_delay
+  type: uint32_t
+  value: 4000
+  mirror: always
+
+# The amount of time we wait from the first request to GC to actually doing the first GC, in ms.
+- name: javascript.options.gc_delay.first
+  type: uint32_t
+  value: 10000
+  mirror: always
+
+# After doing a zonal GC, wait this much time (in ms) and then do a full GC,
+# unless one is already pending.
+- name: javascript.options.gc_delay.full
+  type: uint32_t
+  value: 60000
+  mirror: always
+
+# Maximum amount of time that should elapse between incremental GC slices, in ms.
+- name: javascript.options.gc_delay.interslice
+  type: uint32_t
+  value: 250
+  mirror: always
+
+# nsJSEnvironmentObserver observes the memory-pressure notifications and
+# forces a garbage collection and cycle collection when it happens, if the
+# appropriate pref is set.
+- name: javascript.options.gc_on_memory_pressure
+  type: bool
+  # Disable the JS engine's GC on memory pressure on Android for now to continue investigating its
+  # performance impacts and then decide to enable it or not.
+  # See bug 1450787.
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# We allow at most MIN(max, MAX(NUM_CPUS / cpu_divisor, 1)) concurrent GCs
+# between processes
+- name: javascript.options.concurrent_multiprocess_gcs.cpu_divisor
+  type: RelaxedAtomicUint32
+  value: 4
+  mirror: always
+
+# See 'cpu_divisor' above, 0 means UINT_32_MAX.
+- name: javascript.options.concurrent_multiprocess_gcs.max
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+- name: javascript.options.mem.log
+  type: bool
+  value: false
+  mirror: always
+
+- name: javascript.options.mem.notify
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the Parent process allocates and shares memory with all content
+# processes. This is mirrored once, as the parent process will do this
+# allocation early on.
+- name: javascript.options.self_hosted.use_shared_memory
+  type: bool
+  value: true
+  mirror: always  # LoadStartupJSPrefs
+  do_not_use_directly: true
+
+- name: javascript.options.main_thread_stack_quota_cap
+  type: uint32_t
+#if defined(MOZ_ASAN)
+  value: 6 * 1024 * 1024
+#else
+  value: 2 * 1024 * 1024
+#endif
+  mirror: always
+
+- name: javascript.options.wasm_disable_huge_memory
+  type: bool
+  value: false
+  mirror: always
+  set_spidermonkey_pref: startup
+
+- name: javascript.options.wasm_optimizingjit
+  type: bool
+  value: true
+  mirror: always
+
+-   name: javascript.options.wasm_relaxed_simd
+    type: bool
+#if defined(ENABLE_WASM_RELAXED_SIMD)
+    value: @IS_NIGHTLY_BUILD@
+#else
+    value: false
+#endif
+    mirror: always
+    set_spidermonkey_pref: always
+
+-   name: javascript.options.wasm_moz_intgemm
+    type: bool
+#if defined(ENABLE_WASM_MOZ_INTGEMM)
+    value: @IS_NIGHTLY_BUILD@
+#else
+    value: false
+#endif
+    mirror: always
+    set_spidermonkey_pref: startup
+
+-   name: javascript.options.wasm_exnref
+    type: bool
+    value: true
+    mirror: always
+    set_spidermonkey_pref: startup
+
+-   name: javascript.options.wasm_gc
+    type: bool
+#if defined(ENABLE_WASM_GC)
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+    set_spidermonkey_pref: always
+
+-   name: javascript.options.wasm_memory_control
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: always
+
+-   name: javascript.options.wasm_branch_hinting
+    type: bool
+#if defined(ENABLE_WASM_BRANCH_HINTING)
+    value: @IS_NIGHTLY_BUILD@
+#else
+    value: false
+#endif
+    mirror: always
+    set_spidermonkey_pref: always
+
+#if defined(ENABLE_WASM_SIMD)
+#if defined(JS_CODEGEN_X64) || defined(JS_CODEGEN_X86)
+  # Enables AVX instructions support on X86/X64 platforms.
+  # Changing these prefs requires a restart.
+-   name: javascript.options.wasm_simd_avx
+    type: bool
+    value: true
+    mirror: always
+    set_spidermonkey_pref: startup
+#endif
+#endif
+
+-   name: javascript.options.wasm_memory64
+    type: bool
+#if defined(ENABLE_WASM_MEMORY64)
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+    set_spidermonkey_pref: always
+
+-   name: javascript.options.wasm_multi_memory
+    type: bool
+#if defined(ENABLE_WASM_MULTI_MEMORY)
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+    set_spidermonkey_pref: always
+
+-   name: javascript.options.wasm_js_string_builtins
+    type: bool
+    value: true
+    mirror: always
+    set_spidermonkey_pref: always
+
+-   name: javascript.options.wasm_tail_calls
+    type: bool
+#if defined(ENABLE_WASM_TAIL_CALLS)
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+    set_spidermonkey_pref: always
+
+-   name: javascript.options.wasm_js_promise_integration
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: always
+
+-   name: javascript.options.wasm_test_serialization
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: always
+
+# Enables lazy tiering for wasm modules that have a GC type defined in them.
+# Use wasm_lazy_tiering to enable it for any module.
+-   name: javascript.options.wasm_lazy_tiering_for_gc
+    type: bool
+    value: true
+    mirror: always
+    set_spidermonkey_pref: always
+
+# Enables lazy tiering for all modules. Use wasm_lazy_tiering_for_gc to only
+# enable this for GC modules.
+-   name: javascript.options.wasm_lazy_tiering
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: always
+
+# Aggressiveness of lazy tiering, allowable: 1 .. 9
+# 1 = min (almost never, set tiering threshold to max possible, == 2^31-1)
+# 9 = max (request tier up at first call, set tiering threshold to zero)
+- name: javascript.options.wasm_lazy_tiering_level
+  type: uint32_t
+  value: 5
+  mirror: always
+  set_spidermonkey_pref: always
+
+# Forces lazy tiering to synchronously compile instead of using a background
+# thread.
+- name: javascript.options.wasm_lazy_tiering_synchronous
+  type: bool
+  value: false
+  mirror: always
+  set_spidermonkey_pref: always
+
+# Aggressiveness of inlining (regardless of call kind), allowable: 1 .. 9
+- name: javascript.options.wasm_inlining_level
+  type: uint32_t
+  value: 5
+  mirror: always
+  set_spidermonkey_pref: always
+
+# Are wasm direct calls (within same Instance) candidates for inlining?
+- name: javascript.options.wasm_direct_inlining
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: always
+
+# Are wasm call_ref calls (within same Instance) candidates for inlining?
+- name: javascript.options.wasm_call_ref_inlining
+  type: bool
+  value: true
+  mirror: always
+  set_spidermonkey_pref: always
+
+# When selecting call_ref targets for speculative inlining, this is the minimum
+# percentage of the total number of calls from the call site that a candidate
+# set of targets must collectively have in order to be elegible for inlining.
+# Allowable: 10 .. 100 (%).  Setting it (eg) 75 means the targets must collectively
+# be 75% of all observed calls to be considered for inlining.  Probably unwise to
+# let this be much below 40.
+- name: javascript.options.wasm_call_ref_inlining_percent
+  type: uint32_t
+  value: 40
+  mirror: always
+  set_spidermonkey_pref: always
+
+# Support for pretenuring allocations based on their allocation site.
+- name: javascript.options.site_based_pretenuring
+  type: bool
+  value: true
+  mirror: always
+  do_not_use_directly: true
+  set_spidermonkey_pref: startup
+
+#if defined(DEBUG) || defined(NIGHTLY_BUILD) || defined(JS_GC_ZEAL)
+# Enable extra poisoning of GC memory.
+- name: javascript.options.extra_gc_poisoning
+  type: bool
+#ifdef DEBUG
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+  set_spidermonkey_pref: startup
+#endif
+
+#if !defined(JS_CODEGEN_MIPS32) && !defined(JS_CODEGEN_MIPS64) && !defined(JS_CODEGEN_LOONG64)
+  # Spectre security vulnerability mitigations for the JS JITs.
+  #
+  # NOTE: The MIPS and LoongArch backends do not support these mitigations (and generally
+  #       do not need them). In that case, leave the pref unlisted with its
+  #       default value of false.
+-   name: javascript.options.spectre.index_masking
+    type: bool
+    value: true
+    mirror: always  # LoadStartupJSPrefs
+    do_not_use_directly: true
+
+-   name: javascript.options.spectre.object_mitigations
+    type: bool
+    value: true
+    mirror: always  # LoadStartupJSPrefs
+    do_not_use_directly: true
+
+-   name: javascript.options.spectre.string_mitigations
+    type: bool
+    value: true
+    mirror: always  # LoadStartupJSPrefs
+    do_not_use_directly: true
+
+-   name: javascript.options.spectre.value_masking
+    type: bool
+    value: true
+    mirror: always  # LoadStartupJSPrefs
+    do_not_use_directly: true
+
+-   name: javascript.options.spectre.jit_to_cxx_calls
+    type: bool
+    value: false
+    mirror: always  # LoadStartupJSPrefs
+    do_not_use_directly: true
+#endif  // !defined(JS_CODEGEN_MIPSXX) && !defined(JS_CODEGEN_LOONG64)
+
+# Separate pref to override the values of the Spectre-related prefs above for
+# isolated web content processes, where we don't need these mitigations.
+- name: javascript.options.spectre.disable_for_isolated_content
+  type: bool
+  value: true
+  mirror: always
+
+# Whether the W^X policy is enforced to mark JIT code pages as either writable
+# or executable but never both at the same time. OpenBSD defaults to W^X.
+- name: javascript.options.content_process_write_protect_code
+  type: bool
+#if defined(XP_OPENBSD)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Whether to use the XPCOM thread pool for JS helper tasks.
+- name: javascript.options.external_thread_pool
+  type: bool
+  value: true
+  mirror: always
+  do_not_use_directly: true
+
+# Whether to use the off-thread script compilation and decoding.
+- name: javascript.options.parallel_parsing
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to use fdlibm for Math.sin, Math.cos, and Math.tan. When
+# privacy.resistFingerprinting is true, this pref is ignored and fdlibm is used
+# anyway.
+- name: javascript.options.use_fdlibm_for_sin_cos_tan
+  type: bool
+#if defined(XP_WIN)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+  set_spidermonkey_pref: always
+
+# Whether to support parsing '//(#@) source(Mapping)?URL=' pragmas.
+- name: javascript.options.source_pragmas
+  type: bool
+  value: true
+  mirror: always
+
+# asm.js
+- name: javascript.options.asmjs
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to throw a TypeError if asm.js code hits validation failure.
+- name: javascript.options.throw_on_asmjs_validation_failure
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to disable the jit within the main process
+- name: javascript.options.main_process_disable_jit
+  type: bool
+#ifdef XP_IOS
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "layers."
+#---------------------------------------------------------------------------
+
+# Whether to disable acceleration for all widgets.
+- name: layers.acceleration.disabled
+  type: bool
+  value: false
+  mirror: once
+  do_not_use_directly: true
+# Instead, use gfxConfig::IsEnabled(Feature::HW_COMPOSITING).
+
+# Whether to force acceleration on, ignoring blacklists.
+- name: layers.acceleration.force-enabled
+  type: bool
+  value: false
+  mirror: once
+  do_not_use_directly: true
+
+# Whether we allow AMD switchable graphics.
+- name: layers.amd-switchable-gfx.enabled
+  type: bool
+  value: true
+  mirror: once
+
+# Whether to use async panning and zooming.
+- name: layers.async-pan-zoom.enabled
+  type: bool
+  value: true
+  mirror: once
+  do_not_use_directly: true
+
+- name: layers.d3d11.force-warp
+  type: bool
+  value: false
+  mirror: once
+
+- name: layers.d3d11.enable-blacklist
+  type: bool
+  value: true
+  mirror: once
+
+# Enable DEAA antialiasing for transformed layers in the compositor.
+- name: layers.deaa.enabled
+  type: RelaxedAtomicBool
+#if defined(MOZ_WIDGET_ANDROID)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# Force all possible layers to be always active layers.
+- name: layers.force-active
+  type: bool
+  value: false
+  mirror: always
+
+- name: layers.draw-mask-debug
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: layers.force-synchronous-resize
+  type: RelaxedAtomicBool
+#ifdef MOZ_WAYLAND
+  # We want to control it by nsWindow::SynchronouslyRepaintOnResize() on Linux/Wayland.
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+- name: layers.gpu-process.allow-software
+  type: bool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: once
+
+- name: layers.gpu-process.enabled
+  type: bool
+#if defined(XP_WIN) || defined(MOZ_WIDGET_ANDROID)
+  value: true
+#elif defined(MOZ_X11)
+  value: false  # we'd like this to be @IS_NIGHTLY_BUILD@, see Bug 1927058
+#else
+  value: false
+#endif
+  mirror: once
+
+- name: layers.gpu-process.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: layers.gpu-process.ipc_reply_timeout_ms
+  type: int32_t
+  value: 10000
+  mirror: once
+
+- name: layers.gpu-process.extend_ipc_reply_timeout_ms
+  type: int32_t
+  value: 20000
+  mirror: once
+
+# How many unstable GPU process restarts we allow for a given configuration.
+- name: layers.gpu-process.max_restarts
+  type: RelaxedAtomicInt32
+#if defined(XP_WIN) || defined(MOZ_WIDGET_GTK) || defined(MOZ_WIDGET_ANDROID)
+  value: 6
+#else
+  value: 1
+#endif
+  mirror: always
+
+# How many frames we must render before declaring the GPU process stable, and
+# allow restarts without it counting against our maximum restarts.
+- name: layers.gpu-process.stable.frame-threshold
+  type: RelaxedAtomicUint32
+  value: 10
+  mirror: always
+
+# How many milliseconds the GPU process must have lived before we accept that
+# it is stable, and allow restarts without it counting against our maximum
+# restarts.
+- name: layers.gpu-process.stable.min-uptime-ms
+  type: RelaxedAtomicInt32
+  value: 4 * 60000
+  mirror: always
+
+# Note: This pref will only be used if it is less than layers.gpu-process.max_restarts.
+- name: layers.gpu-process.max_restarts_with_decoder
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: layers.gpu-process.startup_timeout_ms
+  type: int32_t
+  value: 5000
+  mirror: once
+
+- name: layers.gpu-process.crash-also-crashes-browser
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to animate simple opacity and transforms on the compositor.
+- name: layers.offmainthreadcomposition.async-animations
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to log information about off main thread animations to stderr.
+- name: layers.offmainthreadcomposition.log-animations
+  type: bool
+  value: false
+  mirror: always
+
+- name: layers.offmainthreadcomposition.force-disabled
+  type: bool
+  value: false
+  mirror: once
+
+# Compositor target frame rate. NOTE: If vsync is enabled the compositor
+# frame rate will still be capped.
+# -1 -> default (match layout.frame_rate or 60 FPS)
+# 0  -> full-tilt mode: Recomposite even if not transaction occured.
+- name: layers.offmainthreadcomposition.frame-rate
+  type: RelaxedAtomicInt32
+  value: -1
+  mirror: always
+
+#ifdef XP_WIN
+-   name: layers.prefer-opengl
+    type: bool
+    value: false
+    mirror: once
+#endif
+
+# Copy-on-write canvas.
+- name: layers.shared-buffer-provider.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: layers.recycle-allocator-rdd
+  type: bool
+  value: true
+  mirror: once
+
+- name: layers.iosurfaceimage.recycle-limit
+  type: RelaxedAtomicUint32
+  value: 15
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "layout."
+#---------------------------------------------------------------------------
+
+# Debug-only pref to force enable the AccessibleCaret. If you want to
+# control AccessibleCaret by mouse, you'll need to set
+# "layout.accessiblecaret.hide_carets_for_mouse_input" to false.
+- name: layout.accessiblecaret.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Enable the accessible caret on platforms/devices
+# that we detect have touch support. Note that this pref is an
+# additional way to enable the accessible carets, rather than
+# overriding the layout.accessiblecaret.enabled pref.
+- name: layout.accessiblecaret.enabled_on_touch
+  type: bool
+  value: true
+  mirror: always
+
+# By default, carets become tilt only when they are overlapping.
+- name: layout.accessiblecaret.always_tilt
+  type: bool
+  value: false
+  mirror: always
+
+# Show caret in cursor mode when long tapping on an empty content. This
+# also changes the default update behavior in cursor mode, which is based
+# on the emptiness of the content, into something more heuristic. See
+# AccessibleCaretManager::UpdateCaretsForCursorMode() for the details.
+- name: layout.accessiblecaret.caret_shown_when_long_tapping_on_empty_content
+  type: bool
+  value: false
+  mirror: always
+
+# 0 = by default, always hide carets for selection changes due to JS calls.
+# 1 = update any visible carets for selection changes due to JS calls,
+#     but don't show carets if carets are hidden.
+# 2 = always show carets for selection changes due to JS calls.
+- name: layout.accessiblecaret.script_change_update_mode
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Allow one caret to be dragged across the other caret without any limitation.
+# This matches the built-in convention for all desktop platforms.
+- name: layout.accessiblecaret.allow_dragging_across_other_caret
+  type: bool
+  value: true
+  mirror: always
+
+# Optionally provide haptic feedback on long-press selection events.
+- name: layout.accessiblecaret.hapticfeedback
+  type: bool
+  value: false
+  mirror: always
+
+# Smart phone-number selection on long-press is not enabled by default.
+- name: layout.accessiblecaret.extend_selection_for_phone_number
+  type: bool
+  value: false
+  mirror: always
+
+# Keep the accessible carets hidden when the user is using mouse input (as
+# opposed to touch/pen/etc.).
+- name: layout.accessiblecaret.hide_carets_for_mouse_input
+  type: bool
+  value: true
+  mirror: always
+
+# CSS attributes (width, height, margin-left) of the AccessibleCaret in CSS
+# pixels.
+- name: layout.accessiblecaret.width
+  type: float
+  value: 34.0f
+  mirror: always
+
+- name: layout.accessiblecaret.height
+  type: float
+  value: 36.0f
+  mirror: always
+
+- name: layout.accessiblecaret.margin-left
+  type: float
+  value: -18.5f
+  mirror: always
+
+- name: layout.accessiblecaret.transition-duration
+  type: float
+  value: 250.0f
+  mirror: always
+
+# Simulate long tap events to select words. Mainly used in manual testing
+# with mouse.
+- name: layout.accessiblecaret.use_long_tap_injector
+  type: bool
+  value: false
+  mirror: always
+
+# To support magnify glass, whether we dispatch additional chrome event such as
+# dragcaret.
+- name: layout.accessiblecaret.magnifier.enabled
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# One of several prefs affecting the maximum area to pre-render when animating
+# a large element on the compositor.
+# This pref enables transform (and transform like properties) animations on a
+# large element run on the compositor with rendering partial area of the
+# element on the main thread instead of rendering the whole area.  Once the
+# animation tried to composite out of the partial rendered area, the animation
+# is rendered again with the latest visible partial area.
+- name: layout.animation.prerender.partial
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# One of several prefs affecting the maximum area to pre-render when animating
+# a large element on the compositor.
+# This value is applied to both x and y axes and a perfect square contructed
+# by the greater axis value which will be capped by the absolute limits is used
+# for the partial pre-render area.
+- name: layout.animation.prerender.viewport-ratio-limit
+  type: AtomicFloat
+  value: 1.125f
+  mirror: always
+
+# One of several prefs affecting the maximum area to pre-render when animating
+# a large element on the compositor.
+- name: layout.animation.prerender.absolute-limit-x
+  type: RelaxedAtomicUint32
+  value: 4096
+  mirror: always
+
+# One of several prefs affecting the maximum area to pre-render when animating
+# a large element on the compositor.
+- name: layout.animation.prerender.absolute-limit-y
+  type: RelaxedAtomicUint32
+  value: 4096
+  mirror: always
+
+# Test-only pref, if this is true, partial pre-rendered transform animations
+# get stuck when it reaches to the pre-rendered boundaries and the pre-render
+# region is never updated.
+- name: layout.animation.prerender.partial.jank
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to enable CSS Anchor Positioning support.
+# https://drafts.csswg.org/css-anchor-position-1/
+- name: layout.css.anchor-positioning.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Override DPI. A value of -1 means use the maximum of 96 and the system DPI.
+# A value of 0 means use the system DPI. A positive value is used as the DPI.
+# This sets the physical size of a device pixel and thus controls the
+# interpretation of physical units such as "pt".
+- name: layout.css.dpi
+  type: int32_t
+  value: -1
+  mirror: always
+
+# Whether to always underline links.
+- name: layout.css.always_underline_links
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Whether to respect align-content on blocks.
+- name: layout.css.align-content.blocks.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether content-box and stroke-box are enabled for transform-box.
+- name: layout.css.transform-box-content-stroke.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether transition-behavior property is enabled?
+- name: layout.css.transition-behavior.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether @starting-style is enabled?
+- name: layout.css.starting-style-at-rules.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Should we look for counter ancestor scopes first?
+- name: layout.css.counter-ancestor-scope.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether the `-moz-control-character-visibility` property is exposed to
+# content.
+#
+# Only for testing purposes.
+- name: layout.css.moz-control-character-visibility.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Whether the `-moz-user-input` property is exposed to content.
+- name: layout.css.moz-user-input.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# This pref controls whether the `prefers-color-scheme` value of iframes images
+# reacts to the embedder `color-scheme` in content.
+- name: layout.css.iframe-embedder-prefers-color-scheme.content.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Controls the transparency of the initial about:blank document. Generally you
+# don't ever want a white flash in dark mode, but due to backwards compat we
+# have some extra control over this, for now at least.
+#
+# See https://github.com/w3c/csswg-drafts/issues/9624 for iframes.
+#
+# Values:
+#  1: content-inaccessible top-level only.
+#  2: frames and content-inaccessible top-level only.
+#  3: always
+#  Others: don't treat this document specially.
+- name: layout.css.initial-document-transparency
+  type: RelaxedAtomicInt32
+  value: 3
+  mirror: always
+
+# The minimum contrast ratio between the accent color background and white.
+#
+# We don't use this for text, so we need a contrast of at least AA (for user
+# interface components and graphical objects), which per WCAG is 3:1.
+#
+# However that causes some colors that are realistically fine to get darkened,
+# so we lower it a little bit. Eventually we should maybe use something like
+# APCA or so perhaps, see:
+#
+#  * https://ruitina.com/apca-accessible-colour-contrast/
+#  * https://github.com/w3c/csswg-drafts/issues/7937
+#
+# See also:
+#
+#  * https://accent-color.glitch.me/
+#
+# For testing this.
+- name: layout.css.accent-color.min-contrast-ratio
+  type: AtomicFloat
+  value: 2.4
+  mirror: always
+
+# The target contrast ratio between the accent color foreground and background
+# colors when darkening.
+#
+# We aim a bit further than the minimum contrast ratio, which seems to provide
+# nice results in practice.
+- name: layout.css.accent-color.darkening-target-contrast-ratio
+  type: AtomicFloat
+  value: 6.0
+  mirror: always
+
+# Whether the `animation-composition` in css-animations-2 is enabled.
+- name: layout.css.animation-composition.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is the codepath for using cached scrollbar styles enabled?
+- name: layout.css.cached-scrollbar-styles.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether computed local-fragment-only image urls serialize using the same
+# rules as filter/mask/etc (not resolving the URL for local refs).
+#
+# See https://github.com/w3c/csswg-drafts/issues/3195
+- name: layout.css.computed-style.dont-resolve-image-local-refs
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Are implicit tracks in computed grid templates serialized?
+- name: layout.css.serialize-grid-implicit-tracks
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether the system-ui generic family is enabled.
+- name: layout.css.system-ui.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Set the number of device pixels per CSS pixel. A value <= 0 means choose
+# automatically based on user settings for the platform (e.g., "UI scale factor"
+# on Mac). If browser.display.os-zoom-behavior == 1, then a positive value
+# will be multiplied by the text scale factor; otherwise a positive value is
+# used as-is. This controls the size of a CSS "px" at 100% full-zoom.
+# The size of system fonts is also changed in proportion with the change in
+# "px" sizes. Use "ui.textScaleFactor" instead to only change the size of "px".
+# This is only used for windows on the screen, not for printing.
+- name: layout.css.devPixelsPerPx
+  type: AtomicFloat
+  value: -1.0f
+  mirror: always
+
+# Is support for CSS backdrop-filter enabled?
+- name: layout.css.backdrop-filter.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Do we override the blocklist for CSS backdrop-filter?
+- name: layout.css.backdrop-filter.force-enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Is support for rect() enabled?
+- name: layout.css.basic-shape-rect.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is support for shape() enabled?
+- name: layout.css.basic-shape-shape.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+  rust: true
+
+# Is support for xywh() enabled?
+- name: layout.css.basic-shape-xywh.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether alt text in content is enabled.
+- name: layout.css.content.alt-text.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Should stray control characters be rendered visibly?
+- name: layout.css.control-characters.visible
+  type: RelaxedAtomicBool
+  value: @IS_NOT_RELEASE_OR_BETA@
+  mirror: always
+  rust: true
+
+# Whether the `contain-intrinsic-size` CSS property is enabled
+- name: layout.css.contain-intrinsic-size.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is support for GeometryUtils.convert*FromNode enabled?
+- name: layout.css.convertFromNode.enabled
+  type: bool
+  value: @IS_NOT_RELEASE_OR_BETA@
+  mirror: always
+
+- name: layout.css.cross-fade.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Is support for light-dark() on content enabled?
+- name: layout.css.light-dark.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is support for fit-content() enabled?
+- name: layout.css.fit-content-function.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Whether to use tight bounds for floating ::first-letter (legacy Gecko behavior)
+# or loose bounds based on overall font metrics (WebKit/Blink-like behavior)?
+# Values mean:
+#     1   legacy Gecko behavior (tight bounds)
+#     0   loose typographic bounds (similar to webkit/blink)
+#    -1   auto behavior: use loose bounds if reduced line-height (<1em) or negative
+#         block-start margin is present; otherwise use tight bounds.
+- name: layout.css.floating-first-letter.tight-glyph-bounds
+  type: int32_t
+#ifdef NIGHTLY_BUILD
+  value: -1
+#else
+  value: 1
+#endif
+  mirror: always
+
+# Is support for the @font-palette-values rule and font-palette property enabled?
+- name: layout.css.font-palette.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is support for variation fonts enabled?
+- name: layout.css.font-variations.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is support for the size-adjust @font-face descriptor enabled?
+- name: layout.css.size-adjust.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is support for the tech() function in the @font-face src descriptor enabled?
+- name: layout.css.font-tech.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is support for font-variant-emoji enabled?
+- name: layout.css.font-variant-emoji.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+  rust: true
+
+# Visibility level of font families available to CSS font-matching:
+#   1 - only base system fonts
+#   2 - also fonts from optional language packs
+#   3 - also user-installed fonts
+- name: layout.css.font-visibility
+  type: int32_t
+  value: 3
+  mirror: always
+
+# Is support for GeometryUtils.getBoxQuads enabled?
+- name: layout.css.getBoxQuads.enabled
+  type: bool
+  value: @IS_NOT_RELEASE_OR_BETA@
+  mirror: always
+
+# Is support for (linear|radial|conic)-gradient color interpolation methods enabled?
+- name: layout.css.gradient-color-interpolation-method.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Should we propagate baseline alignment information from a parent grid into
+# its subgrids?
+- name: layout.css.grid-subgrid-baselines.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Is support for CSS masonry layout enabled?
+- name: layout.css.grid-template-masonry-value.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+  rust: true
+
+# Is support for :has() enabled?
+- name: layout.css.has-selector.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether the `:has-slotted` pseudo class is enabled
+- name: layout.css.has-slotted-selector.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Is support for CSS initial-letter property enabled?
+- name: layout.css.initial-letter.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Is eager first-letter processing during intrinsic size computation enabled?
+- name: layout.css.intrinsic-size-first-letter.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Which model to use for CSS letter-spacing:
+#   0 - Gecko legacy model, spacing added to trailing side of letter
+#   1 - WebKit/Blink-compatible, spacing always added to right-hand side
+#   2 - Symmetrical spacing, half added to each side
+- name: layout.css.letter-spacing.model
+  type: int32_t
+#if defined(MOZ_DEV_EDITION) || defined(EARLY_BETA_OR_EARLIER)
+  value: 2
+#else
+  value: 0
+#endif
+  mirror: always
+
+# Is support for motion-path url enabled?
+- name: layout.css.motion-path-url.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Pref to control whether the ::marker property restrictions defined in [1]
+# apply.
+#
+# [1]: https://drafts.csswg.org/css-pseudo-4/#selectordef-marker
+- name: layout.css.marker.restricted
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is -moz-osx-font-smoothing enabled? (Only supported in OSX builds)
+- name: layout.css.osx-font-smoothing.enabled
+  type: bool
+#if defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Is support for CSS overflow-clip-box enabled for non-UA sheets?
+- name: layout.css.overflow-clip-box.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Is support for CSS overflow: -moz-hidden-unscrollable enabled
+- name: layout.css.overflow-moz-hidden-unscrollable.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+  rust: true
+
+# Is support for overscroll-behavior enabled?
+- name: layout.css.overscroll-behavior.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Enables support for the page-orientation  property inside of CSS @page rules.
+- name: layout.css.page-orientation.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Enables support for different CSS page sizes on each page when printing.
+- name: layout.css.allow-mixed-page-sizes
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enables support for @margin rules.
+- name: layout.css.margin-rules.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Whether Properties and Values is enabled
+- name: layout.css.properties-and-values.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether @scope rule is enabled
+- name: layout.css.at-scope.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# An override for prefers-color-scheme for content documents.
+#   0: Dark
+#   1: Light
+#   2: Auto (system color scheme unless overridden by browser theme)
+- name: layout.css.prefers-color-scheme.content-override
+  type: RelaxedAtomicInt32
+  value: 2
+  mirror: always
+
+# Dictates whether or not the prefers-reduced-transparency media query is enabled.
+- name: layout.css.prefers-reduced-transparency.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Dictates whether or not the inverted-colors media query is enabled.
+- name: layout.css.inverted-colors.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Is support for -moz-prefixed animation properties enabled?
+- name: layout.css.prefixes.animations
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for -moz-border-image enabled?
+- name: layout.css.prefixes.border-image
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for -moz-box-sizing enabled?
+- name: layout.css.prefixes.box-sizing
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for -moz-prefixed font feature properties enabled?
+- name: layout.css.prefixes.font-features
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for -moz-prefixed transform properties enabled?
+- name: layout.css.prefixes.transforms
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for -moz-prefixed transition properties enabled?
+- name: layout.css.prefixes.transitions
+  type: bool
+  value: false
+  mirror: always
+
+# Enable relative color syntax: https://drafts.csswg.org/css-color-5/#relative-colors
+- name: layout.css.relative-color-syntax.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Is CSS error reporting enabled?
+- name: layout.css.report_errors
+  type: bool
+  value: true
+  mirror: always
+
+# Are inter-character ruby annotations enabled?
+- name: layout.css.ruby.intercharacter.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: layout.css.scroll-behavior.damping-ratio
+  type: AtomicFloat
+  value: 1.0f
+  mirror: always
+
+# Tuning of the smooth scroll motion used by CSSOM-View scroll-behavior.
+# Spring-constant controls the strength of the simulated MSD
+# (Mass-Spring-Damper).
+- name: layout.css.scroll-behavior.spring-constant
+  type: AtomicFloat
+  value: 250.0f
+  mirror: always
+
+# Whether the scroll-driven animations generated by CSS is enabled. This
+# also include animation-timeline property.
+- name: layout.css.scroll-driven-animations.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# When selecting the snap point for CSS scroll snapping, the velocity of the
+# scroll frame is clamped to this speed, in CSS pixels / s.
+- name: layout.css.scroll-snap.prediction-max-velocity
+  type: RelaxedAtomicInt32
+  value: 2000
+  mirror: always
+
+#  When selecting the snap point for CSS scroll snapping, the velocity of the
+# scroll frame is integrated over this duration, in seconds.  The snap point
+# best suited for this position is selected, enabling the user to perform fling
+# gestures.
+- name: layout.css.scroll-snap.prediction-sensitivity
+  type: AtomicFloat
+  value: 0.750f
+  mirror: always
+
+# Stylo thread-pool size.
+# Negative means auto, 0 disables the thread-pool (main-thread styling), other
+# numbers override as specified.
+# Note that 1 still creates a thread-pool of one thread!
+- name: layout.css.stylo-threads
+  type: RelaxedAtomicInt32
+  value: -1
+  mirror: always
+  rust: true
+
+# Stylo work unit size. This is the amount of nodes we'll process in a single
+# unit of work of the thread-pool.
+#
+# Larger values will increase style sharing cache hits and general DOM locality
+# at the expense of decreased opportunities for parallelism.  There are some
+# measurements in bug 1385982 comments 11, 12, 13 that investigate some
+# slightly different values for the work unit size.
+#
+# If the size is significantly increased, make sure to also review
+# stylo-local-work-queue prefs, since we might end up doing too much work
+# sequentially.
+#
+# A value of 0 disables parallelism altogether.
+- name: layout.css.stylo-work-unit-size
+  type: RelaxedAtomicUint32
+  value: 16
+  mirror: always
+  rust: true
+
+# The minimum amount of work that a thread doing styling will try to keep
+# locally before sending work to other threads, in a worker.
+- name: layout.css.stylo-local-work-queue.in-worker
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+  rust: true
+
+# As above but for the main thread. The main thread can't really steal from
+# other threads so it might want a bigger min queue size before giving work to
+# other threads.
+- name: layout.css.stylo-local-work-queue.in-main-thread
+  type: RelaxedAtomicUint32
+  value: 32
+  mirror: always
+  rust: true
+
+# Are counters for implemented CSS properties enabled?
+- name: layout.css.use-counters.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Are counters for unimplemented CSS properties enabled?
+- name: layout.css.use-counters-unimplemented.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Should the :visited selector ever match (otherwise :link matches instead)?
+- name: layout.css.visited_links_enabled
+  type: bool
+  value: true
+  mirror: always
+
+# The margin used for detecting relevancy for `content-visibility: auto`.
+- name: layout.css.content-visibility-relevant-content-margin
+  type: float
+  value: 50 # 50%
+  mirror: always
+
+# Whether the `hanging` and `each-line` keywords are supported by `text-indent`
+- name: layout.css.text-indent-keywords.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether the "modern" uppercase mapping of ß to ẞ (rather than SS) is used.
+- name: layout.css.text-transform.uppercase-eszett.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: layout.css.text-wrap-balance.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Maximum number of lines to try balancing.
+- name: layout.css.text-wrap-balance.limit
+  type: int32_t
+  value: 10
+  mirror: always
+
+- name: layout.css.text-wrap-balance-after-clamp.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: layout.css.text-align.justify-only-after-last-tab
+  type: bool
+  value: true
+  mirror: always
+
+# Support for the css Zoom property.
+- name: layout.css.zoom.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# UA styles for h1 in article/aside/nav/section. See bug 1883896.
+- name: layout.css.h1-in-section-ua-styles.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
+# The maximum width or height of the cursor we should allow when intersecting
+# the UI, in CSS pixels.
+- name: layout.cursor.block.max-size
+  type: uint32_t
+  value: 32
+  mirror: always
+
+- name: layout.cursor.disable-for-popups
+  type: bool
+  value: true
+  mirror: always
+
+- name: layout.display-list.build-twice
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Toggle retaining display lists between paints.
+- name: layout.display-list.retain
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Toggle retaining display lists between paints.
+- name: layout.display-list.retain.chrome
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: layout.display-list.retain.sc
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Set the maximum number of modified frames allowed before doing a full
+# display list rebuild.
+- name: layout.display-list.rebuild-frame-limit
+  type: RelaxedAtomicUint32
+  value: 500
+  mirror: always
+
+# Pref to dump the display list to the log. Useful for debugging drawing.
+- name: layout.display-list.dump
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Pref to dump the display list to the log. Useful for debugging drawing.
+- name: layout.display-list.dump-content
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Pref to dump the display list to the log. Useful for debugging drawing.
+- name: layout.display-list.dump-parent
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: layout.display-list.show-rebuild-area
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: layout.display-list.improve-fragmentation
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Are dynamic reflow roots enabled?
+- name: layout.dynamic-reflow-roots.enabled
+  type: bool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# Enables the mechanism to optimize away flex item's final reflow.
+# Warning: Disabling the pref will impact the performance. This is useful only for
+# debugging flexbox issues.
+- name: layout.flexbox.item-final-reflow-optimization.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Enables the <input type=search> custom layout frame with a clear icon.
+# Still needs tests and a web-exposed way to remove that icon, see bug 1654288.
+- name: layout.forms.input-type-search.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Enables the Reveal Password button inside a <input type=password>.
+- name: layout.forms.reveal-password-button.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# If enabled, textareas won't include 'overflow:auto' scrollbars in their
+# block-axis size (usually height).
+- name: layout.forms.textarea-sizing-excludes-auto-scrollbar.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Pref to control browser frame rate, in Hz. A value <= 0 means choose
+# automatically based on knowledge of the platform (or 60Hz if no platform-
+# specific information is available).
+- name: layout.frame_rate
+  type: RelaxedAtomicInt32
+  value: -1
+  mirror: always
+
+# If it has been this many frame periods since a refresh, assume that painting
+# is quiescent (will not happen again soon).
+- name: layout.idle_period.required_quiescent_frames
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# The amount of time (milliseconds) needed between an idle period's
+# end and the start of the next tick to avoid jank.
+- name: layout.idle_period.time_limit
+  type: uint32_t
+  value: 1
+  mirror: always
+
+# The minimum amount of time (milliseconds) required to be remaining
+# in the current vsync interval for us to attempt an extra tick, or
+# <0 to disable extra ticks entirely.
+- name: layout.extra-tick.minimum-ms
+  type: int32_t
+  value: 4
+  mirror: always
+
+# Whether to load the broken image icon eagerly. This is mostly needed for
+# reftests, since the broken image icon doesn't block the load event and thus
+# there's no easy way to guarantee it's loaded.
+- name: layout.image.eager_broken_image_icon
+  type: bool
+  value: false
+  mirror: always
+
+# Enable/disable interruptible reflow, which allows reflows to stop
+# before completion (and display the partial results) when user events
+# are pending.
+- name: layout.interruptible-reflow.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# On Android, don't synth mouse move events after scrolling, as they cause
+# unexpected user-visible behaviour. Can remove this after bug 1633450 is
+# satisfactorily resolved.
+- name: layout.reflow.synthMouseMove
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# This pref determines which side vertical scrollbars should be on.
+# 0 = end-side in UI direction
+# 1 = end-side in document/content direction
+# 2 = right
+# 3 = left
+- name: layout.scrollbar.side
+  type: int32_t
+  value: 0
+  mirror: always
+
+# This pref is to be set by test code only.
+- name: layout.scrollbars.always-layerize-track
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: layout.scrollbars.click_and_hold_track.continue_to_end
+  type: bool
+# On Linux, click-and-hold on the scrollbar track should continue scrolling
+# until the mouse is released. On the other platforms we want to stop
+# scrolling as soon as the scrollbar thumb has reached the current mouse
+# position.
+#ifdef MOZ_WIDGET_GTK
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Whether anchor is kept selected.
+- name: layout.selectanchor
+  type: bool
+  value: false
+  mirror: always
+
+# Controls caret style and word-delete during text selection.
+# 0: Use platform default
+# 1: Caret moves and blinks as when there is no selection; word
+#    delete deselects the selection and then deletes word.
+# 2: Caret moves to selection edge and is not visible during selection;
+#    word delete deletes the selection (Mac and Linux default).
+# 3: Caret moves and blinks as when there is no selection; word delete
+#    deletes the selection.
+# Windows default is 1 for word delete behavior, the rest as for 2.
+- name: layout.selection.caret_style
+  type: int32_t
+  value: 0
+  mirror: always
+
+# If layout.show_previous_page is true then during loading of a new page we
+# will draw the previous page if the new page has painting suppressed.
+- name: layout.show_previous_page
+  type: bool
+  value: true
+  mirror: always
+
+# Treat top level pages as always-active for the purpose of refresh driver
+# throttling and such.
+#
+# Intended for testing automation and so forth.
+- name: layout.testing.top-level-always-active
+  type: bool
+  value: false
+  mirror: always
+
+# Pref to stop overlay scrollbars from fading out, for testing purposes.
+- name: layout.testing.overlay-scrollbars.always-visible
+  type: bool
+  value: false
+  mirror: always
+
+# Throttled frame rate, in frames per second.
+- name: layout.throttled_frame_rate
+  type: uint32_t
+  value: 1
+  mirror: always
+
+# Whether we should throttle in-process iframes in the active tab.
+- name: layout.throttle_in_process_iframes
+  type: bool
+  value: true
+  mirror: always
+
+- name: layout.lower_priority_refresh_driver_during_load
+  type: bool
+  value: true
+  mirror: always
+
+# If > 0, nsRefreshDriver will keep ticking this amount of milliseconds after
+# top level page load.
+- name: layout.keep_ticking_after_load_ms
+  type: uint32_t
+  value: 1000
+  mirror: always
+
+# Pref to control enabling scroll anchoring.
+- name: layout.css.scroll-anchoring.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Pref to control whether to suspend also RefreshDriver::Tick when the page
+# itself is suspended because of some synchronous operation, like sync XHR.
+- name: layout.skip_ticks_while_page_suspended
+  type: bool
+  value: true
+  mirror: always
+
+# Pref to control how many consecutive scroll-anchoring adjustments (since the
+# most recent user scroll or timeout) we'll average, before we consider whether
+# to automatically turn off scroll anchoring. When we hit this threshold, the
+# actual decision to disable also depends on the
+# min-average-adjustment-threshold pref, see below for more details.
+#
+# Zero disables the heuristic.
+- name: layout.css.scroll-anchoring.max-consecutive-adjustments
+  type: uint32_t
+  value: 10
+  mirror: always
+
+# Whether to reset counting the consecutive scroll-anchoring adjustments during
+# running async scrolling by APZ.
+- name: layout.css.scroll-anchoring.reset-heuristic-during-animation
+  type: bool
+  value: false
+  mirror: always
+
+# The time after which we reset the max-consecutive-adjustments period, in
+# milliseconds.
+#
+# This prevents sporadic back-and-forth scroll anchoring to trigger the
+# max-consecutive-adjustments heuristic.
+- name: layout.css.scroll-anchoring.max-consecutive-adjustments-timeout-ms
+  type: uint32_t
+  value: 500
+  mirror: always
+
+# Pref to control whether we should disable scroll anchoring on a scroller
+# where at least max-consecutive-adjustments have happened, and which the
+# average adjustment ends up being less than this number, in CSS pixels.
+#
+# So, for example, given max-consecutive-adjustments=10 and
+# min-average-adjustment-treshold=3, we'll block scroll anchoring if there have
+# been 10 consecutive adjustments without a user scroll or more, and the
+# average offset difference between them amount to less than 3 CSS pixels.
+- name: layout.css.scroll-anchoring.min-average-adjustment-threshold
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Pref to control disabling scroll anchoring suppression triggers, see
+#
+# https://drafts.csswg.org/css-scroll-anchoring/#suppression-triggers
+#
+# Those triggers should be unnecessary after bug 1561450.
+- name: layout.css.scroll-anchoring.suppressions.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: layout.css.scroll-anchoring.highlight
+  type: bool
+  value: false
+  mirror: always
+
+# Pref to control whether we reselect scroll anchors if sub-optimal
+#
+# See https://github.com/w3c/csswg-drafts/issues/6787
+- name: layout.css.scroll-anchoring.reselect-if-suboptimal
+  type: bool
+  value: true
+  mirror: always
+
+# Are shared memory User Agent style sheets enabled?
+- name: layout.css.shared-memory-ua-sheets.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is the CSS 'stretch' keyword enabled, for size-valued properties like 'width'
+# and 'height'? (Note: this is unrelated to the 'stretch' value for the
+# various alignment properties like 'align-self'; this pref has has
+# no influence on the 'stretch' keyword for those alignment properties.)
+- name: layout.css.stretch-size-keyword.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Is the '-webkit-fill-available' keyword enabled, as an alias for 'stretch'?
+- name: layout.css.webkit-fill-available.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Is support for -webkit-line-clamp on regular blocks enabled?
+- name: layout.css.webkit-line-clamp.block.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Does webkit-line-clamp skip painting clamped lines?
+# See bug 1934547.
+- name: layout.css.webkit-line-clamp.skip-paint
+  type: bool
+  value: false
+  mirror: always
+
+# Is 'content:none' supported on (non-pseudo) elements?
+- name: layout.css.element-content-none.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Whether we want scrollbar-width: thin to behave as scrollbar-width: auto.
+- name: layout.css.scrollbar-width-thin.disabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# field-sizing CSS property
+- name: layout.css.field-sizing.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether supports() conditions in @import is enabled
+- name: layout.css.import-supports.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether :-moz-broken is supported in content.
+- name: layout.css.moz-broken.content.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Whether the modern ::slider-* pseudos are enabled.
+- name: layout.css.modern-range-pseudos.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Is matching video-dynamic-range: high allowed?
+- name: layout.css.video-dynamic-range.allows-high
+  type: RelaxedAtomicBool
+#if defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Whether frame visibility tracking is enabled globally.
+- name: layout.framevisibility.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# The fraction of the scrollport we allow to horizontally scroll by before we
+# schedule an update of frame visibility.
+- name: layout.framevisibility.amountscrollbeforeupdatehorizontal
+  type: int32_t
+  value: 2
+  mirror: always
+
+# The fraction of the scrollport we allow to vertically scroll by before we
+# schedule an update of frame visibility.
+- name: layout.framevisibility.amountscrollbeforeupdatevertical
+  type: int32_t
+  value: 2
+  mirror: always
+
+# The number of scrollports wide to expand when tracking frame visibility.
+- name: layout.framevisibility.numscrollportwidths
+  type: uint32_t
+#ifdef ANDROID
+  value: 1
+#else
+  value: 0
+#endif
+  mirror: always
+
+# The number of scrollports high to expand when tracking frame visibility.
+- name: layout.framevisibility.numscrollportheights
+  type: uint32_t
+  value: 1
+  mirror: always
+
+# Test only.
+- name: layout.dynamic-toolbar-max-height
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Whether outlines should include all overflowing descendants, or just the
+# border-box of a given element.
+#
+# Historically we have included descendants but other browsers have not.
+- name: layout.outline.include-overflow
+  type: bool
+  value: false
+  mirror: always
+
+# Enable/disable overflow/underflow events in content
+- name: layout.overflow-underflow.content.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Enable/disable overflow/underflow events in addon content
+- name: layout.overflow-underflow.content.enabled_in_addons
+  type: bool
+  value: false
+  mirror: always
+
+- name: layout.visibility.min-recompute-interval-ms
+  type: uint32_t
+  value: 1000
+  mirror: always
+
+# Controls double click and Alt+Arrow word selection behavior.
+- name: layout.word_select.eat_space_to_next_word
+  type: bool
+#ifdef XP_WIN
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: layout.word_select.stop_at_punctuation
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether underscore should be treated as a word-breaking character for
+# word selection/arrow-key movement purposes.
+- name: layout.word_select.stop_at_underscore
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to draw images in CSS backgrounds if we only have a partial frame.
+- name: layout.display_partial_background_images
+  type: bool
+  value: true
+  mirror: always
+
+# Controls whether nsRefreshDriver::IsInHighRateMode() may ever return true.
+- name: layout.expose_high_rate_mode_from_refreshdriver
+  type: bool
+  value: true
+  mirror: always
+
+# Whether <details> is forced to be a block, see bug 1856374
+- name: layout.details.force-block-layout
+  type: bool
+  value: true
+  mirror: always
+
+# Whether table cells can generate scroll boxes.
+- name: layout.tables.scrollable-cells
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to disable layer pixel alignment in scroll related stuff.
+- name: layout.scroll.disable-pixel-alignment
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "logging."
+#---------------------------------------------------------------------------
+
+# If this pref is true, prefs in the logging.config branch will be cleared on
+# startup. This prevents unadvertedly creating huge log files that fill the disk
+# when forgetting to remove the logging preferences.
+- name: logging.config.clear_on_startup
+  type: bool
+  value: true
+  mirror: never
+
+# Allow setting log modules at runtimes easily with a MOZ_LOG string.
+# This preference is empty by default but defined, this makes it easy to use
+# especially on mobile by searching for it in about:config.
+- name: logging.config.modules
+  type: String
+  value: ""
+  mirror: never
+
+#---------------------------------------------------------------------------
+# Prefs starting with "mathml."
+#---------------------------------------------------------------------------
+
+# Whether to disable legacy names "thickmathspace", "mediummathspace",
+# "thickmathspace" etc for length attributes.
+- name: mathml.mathspace_names.disabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Whether to disable support for stretching operators with STIXGeneral fonts.
+# macos still has the deprecated STIXGeneral font pre-installed.
+- name: mathml.stixgeneral_operator_stretching.disabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to disable fallback for mathvariant=italic/bold/bold-italic via
+# styling when lacking proper fonts for Mathematical Alphanumeric Symbols.
+# We expect all OSes to have relevant fonts, except Android, see bug 1789083.
+- name: mathml.mathvariant_styling_fallback.disabled
+  type: bool
+#if defined(ANDROID)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# Whether to disable the MathML3 support for the mathvariant attribute. For
+# MathML Core, support is restricted to the <mi> element and to value "normal".
+# Corresponding automatic italicization on single-char <mi> element is also
+# implemented via text-transform: auto when that flag is enabled.
+- name: mathml.legacy_mathvariant_attribute.disabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+  rust: true
+
+# Whether to disable forced centering of binary operators (+, =, ...).
+- name: mathml.centered_operators.disabled
+  type: bool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether to disable extra top/bottom spacing for stretchy operators.
+- name: mathml.top_bottom_spacing_for_stretchy_operators.disabled
+  type: bool
+  value: true
+  mirror: always
+  rust: true
+
+#---------------------------------------------------------------------------
+# Prefs starting with "media."
+#---------------------------------------------------------------------------
+
+
+# This pref defines what the blocking policy would be used in blocking autoplay.
+# 0 : use sticky activation (default)
+# https://html.spec.whatwg.org/multipage/interaction.html#sticky-activation
+# 1 : use transient activation (the transient activation duration can be
+#     adjusted by the pref `dom.user_activation.transient.timeout`)
+# https://html.spec.whatwg.org/multipage/interaction.html#transient-activation
+# 2 : user input depth (allow autoplay when the play is trigged by user input
+#     which is determined by the user input depth)
+- name: media.autoplay.blocking_policy
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# Whether to allow autoplay on extension background pages.
+- name: media.autoplay.allow-extension-background-pages
+  type: bool
+  value: true
+  mirror: always
+
+# Block autoplay, asking for permission by default.
+# 0=Allowed, 1=Blocked, 5=All Blocked
+- name: media.autoplay.default
+  type: int32_t
+  value: 1
+  mirror: always
+
+# File-backed MediaCache size.
+- name: media.cache_size
+  type: RelaxedAtomicUint32
+  value: 512000   # Measured in KiB
+  mirror: always
+
+# Size of file backed MediaCache while on a connection which is cellular (3G,
+# etc), and thus assumed to be "expensive".
+- name: media.cache_size.cellular
+  type: RelaxedAtomicUint32
+  value: 32768   # Measured in KiB
+  mirror: always
+
+# Multiplier to change the sample rate at which input-only streams run, so as
+# to similate clock drift.
+- name: media.cubeb.input_drift_factor
+  type: AtomicFloat
+  mirror: always
+  value: 1.f
+
+# Multiplier to change the sample rate at which output-only streams run, so as
+# to similate clock drift.
+- name: media.cubeb.output_drift_factor
+  type: AtomicFloat
+  mirror: always
+  value: 1.f
+
+# Whether cubeb is sandboxed (AudioIPC)
+- name: media.cubeb.sandbox
+  type: bool
+  mirror: always
+#if defined(XP_LINUX) || defined(XP_WIN) || defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+
+# Whether or not to pass AUDCLNT_STREAMOPTIONS_RAW when initializing audio
+# streams when using WASAPI.
+# 0 - don't use RAW streams
+# 1 - use RAW streams for input streams only
+# 2 - use RAW streams for output streams only
+# 3 - use RAW streams for input and output streams
+#if defined (XP_WIN)
+- name: media.cubeb.wasapi-raw
+  type: RelaxedAtomicUint32
+  mirror: always
+  value: 0
+#endif // XP_WIN
+
+# Whether to make the start of cubeb stream slower, and by how many
+# milliseconds.
+- name: media.cubeb.slow_stream_init_ms
+  type: RelaxedAtomicUint32
+  mirror: always
+  value: 0
+
+# If a resource is known to be smaller than this size (in kilobytes), a
+# memory-backed MediaCache may be used; otherwise the (single shared global)
+# file-backed MediaCache is used.
+- name: media.memory_cache_max_size
+  type: uint32_t
+  value: 8192        # Measured in KiB
+  mirror: always
+
+# Don't create more memory-backed MediaCaches if their combined size would go
+# above this absolute size limit.
+- name: media.memory_caches_combined_limit_kb
+  type: uint32_t
+  value: 524288
+  mirror: always
+
+# Don't create more memory-backed MediaCaches if their combined size would go
+# above this relative size limit (a percentage of physical memory).
+- name: media.memory_caches_combined_limit_pc_sysmem
+  type: uint32_t
+  value: 5           # A percentage
+  mirror: always
+
+# When a network connection is suspended, don't resume it until the amount of
+# buffered data falls below this threshold (in seconds).
+- name: media.cache_resume_threshold
+  type: RelaxedAtomicUint32
+  value: 30
+  mirror: always
+- name: media.cache_resume_threshold.cellular
+  type: RelaxedAtomicUint32
+  value: 10
+  mirror: always
+
+# Stop reading ahead when our buffered data is this many seconds ahead of the
+# current playback position. This limit can stop us from using arbitrary
+# amounts of network bandwidth prefetching huge videos.
+- name: media.cache_readahead_limit
+  type: RelaxedAtomicUint32
+  value: 60
+  mirror: always
+- name: media.cache_readahead_limit.cellular
+  type: RelaxedAtomicUint32
+  value: 30
+  mirror: always
+
+# MediaCapabilities
+- name: media.mediacapabilities.drop-threshold
+  type: RelaxedAtomicInt32
+  value: 95
+  mirror: always
+
+- name: media.mediacapabilities.from-database
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# AudioSink
+- name: media.resampling.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# libcubeb backend implements .get_preferred_channel_layout
+- name: media.forcestereo.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN) || defined(XP_DARWIN) || defined(MOZ_PULSEAUDIO)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# MediaSource
+
+# Whether to enable MediaSource support.
+- name: media.mediasource.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.mediasource.mp4.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.mediasource.webm.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Check if vp9 is enabled by default in mediasource. False on Android.
+# If disabled, vp9 will only be enabled under some conditions:
+# - h264 HW decoding is not supported
+# - mp4 is not enabled
+# - Device was deemed fast enough to decode VP9 via the VP9Benchmark utility
+# - A VP9 HW decoder is present.
+- name: media.mediasource.vp9.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# Whether to enable MediaSource v2 support.
+- name: media.mediasource.experimental.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to enable experimental requestVideoFrameCallback support
+- name: media.rvfc.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# true for talos tests so that VideoSink passes on the most recently decoded
+# frame to exercise the compositor even when the frame is out of date because
+# the decoder is stressed.
+# If this were true for normal playback, then presentation of such late decoded
+# video frames would be out of sync with audio, and VideoPlaybackQuality
+# metrics would provide no indication of the poor playback. [1]
+# For normal playback, this is false, which does not restore A/V sync in this
+# situation, but some out-of-date frames are dropped.  The dropped frame count
+# is reported to content in VideoPlaybackQuality metrics.
+# [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1258870#c6
+- name: media.ruin-av-sync.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Encrypted Media Extensions
+- name: media.eme.enabled
+  type: bool
+#if defined(XP_LINUX) && !defined(MOZ_WIDGET_ANDROID)
+  # On Linux EME is visible but disabled by default. This is so that the "Play
+  # DRM content" checkbox in the Firefox UI is unchecked by default. DRM
+  # requires downloading and installing proprietary binaries, which users on an
+  # open source operating systems didn't opt into. The first time a site using
+  # EME is encountered, the user will be prompted to enable DRM, whereupon the
+  # EME plugin binaries will be downloaded if permission is granted.
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# Whether we expose the functionality proposed in
+# https://w3c.github.io/encrypted-media/#ref-for-dom-mediakeysystemmediacapability-encryptionscheme-2
+# I.e. if true, apps calling navigator.requestMediaKeySystemAccess() can pass
+# an optional encryption scheme as part of MediaKeySystemMediaCapability
+# objects. If a scheme is present when we check for support, we must ensure we
+# support that scheme in order to provide key system access.
+- name: media.eme.encrypted-media-encryption-scheme.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Do we need explicit approval from the application to allow access to EME?
+# If true, Gecko will ask for permission before allowing MediaKeySystemAccess.
+# At time of writing this is aimed at GeckoView, and setting this to true
+# outside of GeckoView or test environments will likely break EME.
+- name: media.eme.require-app-approval
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.eme.audio.blank
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.eme.video.blank
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.eme.chromium-api.video-shmems
+  type: RelaxedAtomicUint32
+  value: 6
+  mirror: always
+
+# Is support for MediaKeys.getStatusForPolicy enabled?
+- name: media.eme.hdcp-policy-check.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: media.eme.max-throughput-ms
+  type: RelaxedAtomicUint32
+  value: 500
+  mirror: always
+
+- name: media.clearkey.persistent-license.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Are test specific clearkey key systems enabled and exposed?
+- name: media.clearkey.test-key-systems.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.cloneElementVisually.testing
+  type: bool
+  value: false
+  mirror: always
+
+# Does the GMPlugin process initialize minimal XPCOM
+- name: media.gmp.use-minimal-xpcom
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Does the GMPlugin process use native event processing
+- name: media.gmp.use-native-event-processing
+  type: RelaxedAtomicBool
+  value: @IS_NOT_XP_MACOSX@
+  mirror: always
+
+# How long in milliseconds before timing out to destroy en/decoders gracefully
+- name: media.gmp.coder-shutdown-timeout-ms
+  type: RelaxedAtomicUint32
+  value: 1000
+  mirror: always
+
+#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
+  # Whether to allow, on a Linux system that doesn't support the necessary
+  # sandboxing features, loading Gecko Media Plugins unsandboxed.  However, EME
+  # CDMs will not be loaded without sandboxing even if this pref is changed.
+-   name: media.gmp.insecure.allow
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+#endif
+
+# (When reading the next line, know that preprocessor.py doesn't
+# understand parentheses, but && is higher precedence than ||.)
+#if defined(XP_WIN) && defined(_ARM64_) || defined(XP_MACOSX)
+  # These prefs control whether or not we will allow x86/x64 plugins
+  # to run on Windows ARM or Apple Silicon machines. This requires
+  # launching the GMP child process executable in x86/x64 mode. We
+  # expect to allow this for Widevine until an arm64 version of
+  # Widevine and Clearkey is made available. We don't expect to need
+  # to allow this for OpenH264.
+  #
+  # For Apple Silicon and OSX, it will be for universal builds and
+  # whether or not it can use the x64 Widevine plugin.
+  #
+  # For Windows ARM, it will be for ARM builds and whether or not it
+  # can use x86 Widevine or Clearkey plugins.
+
+  # May a Widevine GMP x64 process be executed on ARM builds.
+- name: media.gmp-widevinecdm.allow-x64-plugin-on-arm64
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+  # May an OpenH264 GMP x64 process be executed on ARM builds.
+- name: media.gmp-gmpopenh264.allow-x64-plugin-on-arm64
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+  # May a Clearkey GMP x64 process be executed on ARM builds.
+- name: media.gmp-gmpclearkey.allow-x64-plugin-on-arm64
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+#endif
+
+# Specifies whether the PDMFactory can create a test decoder that just outputs
+# blank frames/audio instead of actually decoding. The blank decoder works on
+# all platforms.
+- name: media.use-blank-decoder
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.gpu-process-decoder
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.ffvpx-hw.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# The codecs in the vendored ffmpeg copy are usually prefered to the other
+# codecs. This allows changing this policy for testing purposes.
+- name: media.prefer-non-ffvpx
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.rdd-process.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#elif defined(XP_MACOSX)
+  value: true
+#elif defined(XP_LINUX) && !defined(ANDROID)
+  value: true
+#elif defined(XP_FREEBSD)
+  value: true
+#elif defined(XP_OPENBSD)
+  value: true
+#elif defined(XP_SOLARIS)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.rdd-retryonfailure.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.rdd-process.startup_timeout_ms
+  type: RelaxedAtomicInt32
+  value: 5000
+  mirror: always
+
+# Specifies how many times we restart RDD process after crash till we give up.
+# After first RDD restart we disable HW acceleration on Linux.
+- name: media.rdd-process.max-crashes
+  type: RelaxedAtomicInt32
+  value: 2
+  mirror: always
+
+#ifdef MOZ_FFMPEG
+- name: media.rdd-ffmpeg.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+#endif
+
+
+- name: media.rdd-ffvpx.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#elif defined(XP_MACOSX)
+  value: true
+#elif defined(XP_LINUX) && !defined(ANDROID)
+  value: true
+#elif defined(XP_FREEBSD)
+  value: true
+#elif defined(XP_OPENBSD)
+  value: true
+#elif defined(XP_SOLARIS)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+#ifdef MOZ_WMF
+- name: media.rdd-wmf.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+#endif
+
+#ifdef MOZ_APPLEMEDIA
+- name: media.rdd-applemedia.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+#endif
+
+- name: media.rdd-vorbis.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#elif defined(XP_MACOSX)
+  value: true
+#elif defined(XP_LINUX) && !defined(ANDROID)
+  value: true
+#elif defined(XP_FREEBSD)
+  value: true
+#elif defined(XP_OPENBSD)
+  value: true
+#elif defined(XP_SOLARIS)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.rdd-vpx.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#elif defined(XP_MACOSX)
+  value: true
+#elif defined(XP_LINUX) && !defined(ANDROID)
+  value: true
+#elif defined(XP_FREEBSD)
+  value: true
+#elif defined(XP_OPENBSD)
+  value: true
+#elif defined(XP_SOLARIS)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.rdd-wav.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#elif defined(XP_MACOSX)
+  value: true
+#elif defined(XP_LINUX) && !defined(ANDROID)
+  value: true
+#elif defined(XP_FREEBSD)
+  value: true
+#elif defined(XP_OPENBSD)
+  value: true
+#elif defined(XP_SOLARIS)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.rdd-opus.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#elif defined(XP_MACOSX)
+  value: true
+#elif defined(XP_LINUX) && !defined(ANDROID)
+  value: true
+#elif defined(XP_FREEBSD)
+  value: true
+#elif defined(XP_OPENBSD)
+  value: true
+#elif defined(XP_SOLARIS)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.rdd-webaudio.batch.size
+  type: RelaxedAtomicInt32
+  value: 100
+  mirror: always
+
+# This pref is here to control whether we want to perform audio decoding by
+# using the IPC actor within the Utility process rather than the RDD process.
+# When it is set to true, then the utility process will take precedence over RDD
+# to perform audio decoding.
+# TODO: Enabling for Isolated Processes builds on Android
+- name: media.utility-process.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#elif defined(XP_MACOSX)
+  value: true
+#elif defined(XP_LINUX) && !defined(ANDROID)
+  value: true
+#elif defined(ANDROID) && !defined(MOZ_ANDROID_CONTENT_SERVICE_ISOLATED_PROCESS)
+  value: true
+#elif defined(XP_FREEBSD)
+  value: true
+#elif defined(XP_OPENBSD)
+  value: true
+#elif defined(XP_SOLARIS)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Specifies how many times we restart Utility process after crash till we give
+# up.
+- name: media.utility-process.max-crashes
+  type: RelaxedAtomicInt32
+  value: 2
+  mirror: always
+
+#ifdef MOZ_FFMPEG
+- name: media.utility-ffmpeg.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+#endif
+
+- name: media.utility-ffvpx.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#ifdef MOZ_WMF
+- name: media.utility-wmf.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+#endif
+
+#ifdef MOZ_APPLEMEDIA
+- name: media.utility-applemedia.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+#endif
+
+- name: media.utility-vorbis.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.utility-wav.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.utility-opus.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#ifdef ANDROID
+  # Enable the MediaCodec PlatformDecoderModule by default.
+-   name: media.android-media-codec.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+  # Bug 1771196
+  # Dont yet enable AndroidDecoderModule on Utility
+-   name: media.utility-android-media-codec.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+-   name: media.android-media-codec.preferred
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#endif  # ANDROID
+
+# Now we will completely disable the ability to perform audio decoding outside
+# of Utility.
+-   name: media.allow-audio-non-utility
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+#ifdef MOZ_OMX
+-   name: media.omx.enabled
+    type: bool
+    value: false
+    mirror: always
+#endif
+
+# Allow ffmpeg decoder to decode directly onto shmem buffer
+- name: media.ffmpeg.customized-buffer-allocation
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Disable falling back to software decoders in case of frame drop
+- name: media.ffmpeg.disable-software-fallback
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#ifdef MOZ_FFMPEG
+-   name: media.ffmpeg.enabled
+    type: RelaxedAtomicBool
+  #if defined(XP_MACOSX)
+    value: false
+  #else
+    value: true
+  #endif
+    mirror: always
+
+-   name: media.libavcodec.allow-obsolete
+    type: bool
+    value: false
+    mirror: always
+#endif  # MOZ_FFMPEG
+
+# Allow using ffmpeg encoder
+-   name: media.ffmpeg.encoder.enabled
+    type: RelaxedAtomicBool
+#if !defined(MOZ_WIDGET_ANDROID)
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+
+# A high quantizer value allows the encoder to use higher compression, but
+# resulting in lower quality for parts of the video. Using a lower value
+# restricts excessive compression, improving video quality but potentially
+# increasing file size. The quantizer's value range is controlled by the min
+# and max values below. The lower the value is, the finer the quantizer will be
+# Set AVCodecContext's qmin value to ffmpeg encoder
+-   name: media.ffmpeg.encoder.quantizer-min
+    type: RelaxedAtomicInt32
+    value: 10 # An empirical value for better performance
+    mirror: always
+
+# Set AVCodecContext's qmax value to ffmpeg encoder
+-   name: media.ffmpeg.encoder.quantizer-max
+    type: RelaxedAtomicInt32
+    value: 35 # An empirical value for better quality of the video output
+    mirror: always
+
+# Allow using openh264 decoding with ffmpeg
+-   name: media.ffmpeg.allow-openh264
+    type: RelaxedAtomicBool
+    value: @IS_NOT_NIGHTLY_BUILD@
+    mirror: always
+
+#ifdef MOZ_WIDGET_GTK
+# Use VA-API for ffmpeg video playback on Linux
+- name: media.ffmpeg.vaapi.enabled
+  type: bool
+  value: false
+  mirror: once
+
+# Force to copy dmabuf video frames
+# Used for debugging/troubleshooting only
+# 0 - force disable
+# 1 - force enable
+# 2 - default
+- name: media.ffmpeg.vaapi.force-surface-zero-copy
+  type: uint32_t
+  value: 2
+  mirror: once
+#endif # MOZ_WIDGET_GTK
+
+# Set to true in marionette tests to disable the sanity test
+# which would lead to unnecessary start of the RDD process.
+-   name: media.sanity-test.disabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+#ifdef MOZ_WMF
+
+-   name: media.wmf.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+  # Whether DD should consider WMF-disabled a WMF failure, useful for testing.
+-   name: media.decoder-doctor.wmf-disabled-is-failure
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+-   name: media.wmf.dxva.d3d11.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: media.wmf.dxva.max-videos
+    type: RelaxedAtomicUint32
+    value: 8
+    mirror: always
+
+-   name: media.wmf.use-nv12-format
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: media.wmf.zero-copy-nv12-textures
+    type: bool
+    value: true
+    mirror: once
+# Enable hardware decoded video no copy even when it is blocked.
+-   name: media.wmf.zero-copy-nv12-textures-force-enabled
+    type: bool
+    value: false
+    mirror: once
+
+-   name: media.wmf.force.allow-p010-format
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+-   name: media.wmf.use-sync-texture
+    type: bool
+    value: true
+    mirror: once
+
+-   name: media.wmf.low-latency.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: media.wmf.skip-blacklist
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+-   name: media.wmf.amd.highres.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: media.wmf.allow-unsupported-resolutions
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: media.wmf.vp9.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: media.wmf.av1.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+# Using Windows Media Foundation Media Engine for encrypted playback
+# 0 : disable, 1 : enable for encrypted and clear,
+# 2 : enable for encrypted only, 3 : enable for clear only
+-   name: media.wmf.media-engine.enabled
+    type: RelaxedAtomicUint32
+    value: 2
+    mirror: always
+
+# Testing purpose, enable media engine on channel decoder as well.
+-   name: media.wmf.media-engine.channel-decoder.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+# The amount of video raw data the engine stream will queue
+-   name: media.wmf.media-engine.raw-data-threshold.video
+    type: RelaxedAtomicInt32
+    value: 500000
+    mirror: always
+
+# The amount of audio raw data the engine stream will queue
+-   name: media.wmf.media-engine.raw-data-threshold.audio
+    type: RelaxedAtomicInt32
+    value: 2000000
+    mirror: always
+
+# Specifies how many times we restart MFCDM process after crash till we give up.
+-   name: media.wmf.media-engine.max-crashes
+    type: RelaxedAtomicInt32
+    value: 2
+    mirror: always
+
+# Bypass the gfx block list check for the media engine playback.
+-   name: media.wmf.media-engine.bypass-gfx-blocklist
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+# [TEST-ONLY] Use Media Foundation Clearkey CDM for EME related testing.
+-   name: media.eme.wmf.clearkey.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+# [TEST-ONLY] use Media Foundation clearkey CDM dll to mock as an external CDM,
+# external CDM like Widevine and PlayReady so that we won't be interfered by
+# unexpected behaviors caused by the external library.
+-   name: media.eme.wmf.use-mock-cdm-for-external-cdms
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+# Enable PlayReady DRM for EME
+-   name: media.eme.playready.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+# Use IsTypeSupportedEx for PlayReady
+-   name: media.eme.playready.istypesupportedex
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+# Enable HEVC support via the windows media foundation
+# 0 : disable, 1 : enable for media engine and MFT,
+# 2 : enable for media engine only
+-   name: media.wmf.hevc.enabled
+    type: RelaxedAtomicUint32
+    value: 1
+    mirror: always
+
+# Enable Widevine experiment DRM for EME
+-   name: media.eme.widevine.experiment.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+# Enable origin filter for MFCDM support
+# 0 : disabled, 1 : enabled allowed list, 2 : enabled blocked list
+-   name: media.eme.mfcdm.origin-filter.enabled
+    type: RelaxedAtomicUint32
+#if defined(NIGHTLY_BUILD)
+    value: 2
+#else
+    value: 1
+#endif
+    mirror: always
+
+#endif  # MOZ_WMF
+
+- name: media.decoder-doctor.testing
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.hardware-video-decoding.enabled
+  type: bool
+  value: true
+  mirror: once
+
+- name: media.hardware-video-decoding.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+# Whether to check the decoder supports recycling.
+- name: media.decoder.recycle.enabled
+  type: RelaxedAtomicBool
+  value: @IS_ANDROID@
+  mirror: always
+
+# Should MFR try to skip to the next key frame?
+- name: media.decoder.skip-to-next-key-frame.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The delay time (ms) before releasing an audio wakelock.
+-   name: media.wakelock.audio.delay-releasing.ms
+    type: RelaxedAtomicUint32
+    value: 10000
+    mirror: always
+
+# When video continues later than the current media time for this period of
+# time, then it will trigger skip-to-next-keyframe mechanism. As this aims to
+# solve the drop frames issue where video decoding too slow for high
+# resolution videos. eg. 4k+. Therefore, the value is is determined by the
+# telemetry probe `video_inter_keyframe_max_ms` in the key of `AV,h>2160` which
+# shows that 95% video's key frame interval are less than ~5000. We use its
+# half value as a threashold to decide whether we should keep decoding in the
+# current video position or jump to the next keyframe in order to decode future
+# frames in advance.
+- name: media.decoder.skip_when_video_too_slow_ms
+  type: RelaxedAtomicInt32
+  value: 2500
+  mirror: always
+
+# True if we want to decode in batches.
+- name: media.gmp.decoder.decode_batch
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# True if we allow use of any decoders found in GMP plugins.
+- name: media.gmp.decoder.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# True if we want to request the multithreaded GMP decoder.
+- name: media.gmp.decoder.multithreaded
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# True if we want to try using the GMP plugin decoders first.
+- name: media.gmp.decoder.preferred
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# True if we want to reorder frames from the decoder based on the timestamp.
+- name: media.gmp.decoder.reorder_frames
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# True if we allow use of any encoders found in GMP plugins.
+- name: media.gmp.encoder.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# True if we want to request the multithreaded GMP encoder.
+- name: media.gmp.encoder.multithreaded
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# True if we want to try using the GMP plugin encoders first.
+- name: media.gmp.encoder.preferred
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to suspend decoding of videos in background tabs.
+- name: media.suspend-background-video.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Delay, in ms, from time window goes to background to suspending
+# video decoders. Defaults to 10 seconds.
+- name: media.suspend-background-video.delay-ms
+  type: RelaxedAtomicUint32
+  value: 10000
+  mirror: always
+
+- name: media.dormant-on-pause-timeout-ms
+  type: RelaxedAtomicInt32
+  value: 5000
+  mirror: always
+
+# AudioTrack and VideoTrack support
+- name: media.track.enabled
+  type: bool
+  value: false
+  mirror: always
+
+
+# This pref disables the reception of RTCP. It is used for testing.
+- name: media.webrtc.net.force_disable_rtcp_reception
+  type: ReleaseAcquireAtomicBool
+  value: false
+  mirror: always
+
+# This pref disables using PQ crypto for WebRTC DTLS code.
+- name: media.webrtc.enable_pq_dtls
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# This pref controls whether dispatch testing-only events.
+- name: media.webvtt.testing.events
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.webspeech.synth.force_global_queue
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.webspeech.test.enable
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.webspeech.test.fake_fsm_events
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.webspeech.test.fake_recognition_service
+  type: bool
+  value: false
+  mirror: always
+
+#ifdef MOZ_WEBSPEECH
+-   name: media.webspeech.recognition.enable
+    type: bool
+    value: false
+    mirror: always
+#endif
+
+- name: media.webspeech.recognition.force_enable
+  type: bool
+  value: false
+  mirror: always
+
+#ifdef MOZ_WEBSPEECH
+-   name: media.webspeech.synth.enabled
+    type: bool
+    value: true
+    mirror: always
+#endif  # MOZ_WEBSPEECH
+
+- name: media.encoder.webm.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.audio-max-decode-error
+  type: uint32_t
+#if defined(RELEASE_OR_BETA)
+  value: 3
+#else
+  # Zero tolerance in pre-release builds to detect any decoder regression.
+  value: 0
+#endif
+  mirror: always
+
+- name: media.video-max-decode-error
+  type: uint32_t
+#if defined(RELEASE_OR_BETA)
+  value: 2
+#else
+  # Zero tolerance in pre-release builds to detect any decoder regression.
+  value: 0
+#endif
+  mirror: always
+
+# Are video stats enabled? (Disabling can help prevent fingerprinting.)
+- name: media.video_stats.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# forces the number of dropped frames to 0
+- name: media.video.dropped_frame_stats.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Opus
+- name: media.opus.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Wave
+- name: media.wave.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Ogg
+- name: media.ogg.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# WebM
+- name: media.webm.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# AV1
+- name: media.av1.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.av1.use-dav1d
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.av1.new-thread-count-strategy
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.av1.force-thread-count
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: media.flac.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Hls
+- name: media.hls.enabled
+  type: RelaxedAtomicBool
+#if defined(ANDROID)
+  value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+#else
+  value: false
+#endif
+  mirror: always
+
+# Max number of HLS players that can be created concurrently. Used only on
+# Android and when "media.hls.enabled" is true.
+#ifdef ANDROID
+-   name: media.hls.max-allocations
+    type: uint32_t
+    value: 20
+    mirror: always
+#endif
+
+- name: media.mp4.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.mp4.sniff_iso_brand
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Error/warning handling, Decoder Doctor.
+#
+# Set to true to force demux/decode warnings to be treated as errors.
+- name: media.playback.warnings-as-errors
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Resume video decoding when the cursor is hovering on a background tab to
+# reduce the resume latency and improve the user experience.
+- name: media.resume-background-video-on-tabhover
+  type: bool
+  value: true
+  mirror: always
+
+# Media Seamless Looping
+- name: media.seamless-looping
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.seamless-looping-video
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.autoplay.block-event.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.media-capabilities.screen.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.benchmark.vp9.fps
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+- name: media.benchmark.vp9.threshold
+  type: RelaxedAtomicUint32
+  value: 150
+  mirror: always
+
+- name: media.benchmark.vp9.versioncheck
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+- name: media.benchmark.frames
+  type: RelaxedAtomicUint32
+  value: 300
+  mirror: always
+
+- name: media.benchmark.timeout
+  type: RelaxedAtomicUint32
+  value: 1000
+  mirror: always
+
+- name: media.test.video-suspend
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.test.null.decoder.creation-failure
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# MediaCapture prefs follow
+
+# Enables navigator.mediaDevices and getUserMedia() support. See also
+# media.peerconnection.enabled
+- name: media.navigator.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# This pref turns off window-focus checks on the navigator.mediaDevices methods,
+# for partner testing frameworks.
+# Prefer "focusmanager.testmode", which is already set by default for
+# web-platform tests.
+- name: media.devices.unfocused.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# This pref turns off [SecureContext] on the navigator.mediaDevices object, for
+# more compatible legacy behavior.
+- name: media.devices.insecure.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# If the above pref is also enabled, this pref enabled getUserMedia() support
+# in http, bypassing the instant NotAllowedError you get otherwise.
+- name: media.getusermedia.insecure.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Enable tab sharing
+- name: media.getusermedia.browser.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# The getDisplayMedia method is always SecureContext regardless of the above two
+# prefs. But it is not implemented on android, and can be turned off elsewhere.
+- name: media.getdisplaymedia.enabled
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# The getDisplayMedia prompt uses getDisplayMedia under the hood to show previews.
+# This can be turned off if, e.g. on systems with known issues like X11, or if
+# previews are not desired.
+- name: media.getdisplaymedia.previews.enabled
+  type: bool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+#if defined(MOZ_WEBRTC) && defined(XP_MACOSX)
+# Use the libwebrtc ScreenCaptureKit desktop capture backend on Mac by default.
+# When disabled, or on a host where not supported (< macOS 14), the older
+# CoreGraphics backend is used instead.
+-   name: media.getdisplaymedia.screencapturekit.enabled
+    type: bool
+    value: true
+    mirror: once
+
+# Use SCContentSharingPicker for source picking when the libwebrtc
+# ScreenCaptureKit desktop capture backend is used. When this is true and the
+# backend supports SCContentSharingPicker, this takes precendence over the
+# enumeration pref below.
+-   name: media.getdisplaymedia.screencapturekit.picker.enabled
+    type: bool
+    value: true
+    mirror: once
+
+# Use the libwebrtc ScreenCaptureKit desktop capture backend on Mac for screen
+# enumeration when enabled.
+# When this is false and the backend is used (see above), the older CoreGraphics
+# backend is used to enumerate CGDirectDisplayIDs, which the ScreenCaptureKit
+# backend understand as well.
+-   name: media.getdisplaymedia.screencapturekit.enumeration.enabled
+    type: bool
+    value: false
+    mirror: once
+#endif
+
+# Turn off any cameras (but not mics) while in the background. This is desirable
+# on mobile.
+- name: media.getusermedia.camera.background.mute.enabled
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# Use the libwebrtc AVFoundation camera backend on Mac by default. When
+# disabled, an older forked capture module is used.
+- name: media.getusermedia.camera.macavf.enabled
+  type: bool
+  value: true
+  mirror: once
+
+# Tell the audio backend to prefer a stream adapted for voice when processing is
+# enabled through constraints (possibly defaults). Whether it has any effect
+# depends on the backend.
+- name: media.getusermedia.microphone.prefer_voice_stream_with_processing.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Tell the audio backend to create a voice stream for later re-use before asking
+# the user for microphone permissions, if approving those permissions would
+# result in a voice stream when created later on.
+- name: media.getusermedia.microphone.voice_stream_priming.enabled
+  type: RelaxedAtomicBool
+  value: @IS_XP_MACOSX@
+  mirror: always
+
+# This pref turns on legacy (non-spec) exposure of camera and microphone
+# information from enumerateDevices and devicechange ahead of successful
+# getUserMedia calls. Should only be turned on to resolve web compat issues,
+# since doing so reveals more user fingerprinting information to trackers.
+#
+# In this mode, camera and microphone device labels are exposed if the site has a
+# persisted permission to either kind, as well as while actively capturing either
+# kind (temporary and tab-specific grace-period permissions do not count).
+- name: media.devices.enumerate.legacy.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Turns on legacy (non-spec) exposure of camera and microphone information
+# from enumerateDevices and devicechange ahead of successful getUserMedia
+# calls only for certain domains (ignored if above pref is true).
+- name: media.devices.enumerate.legacy.allowlist
+  type: String
+  value: "slack.com,*.slack.com"
+  mirror: never
+
+# WebRTC prefs follow
+
+# Enables auto refresh of peerconnection stats by default
+- name: media.aboutwebrtc.auto_refresh.peerconnection_section
+  type: bool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
+# Enables auto refresh of the transport connection log by default
+- name: media.aboutwebrtc.auto_refresh.connection_log_section
+  type: bool
+  value: false
+  mirror: always
+
+# Enables auto refresh of user config by default
+- name: media.aboutwebrtc.auto_refresh.user_modified_config_section
+  type: bool
+  value: true
+  mirror: always
+
+# Enables auto refresh of media context by default
+- name: media.aboutwebrtc.auto_refresh.media_ctx_section
+  type: bool
+  value: false
+  mirror: always
+
+# Enables RTCPeerConnection support. Note that, when true, this pref enables
+# navigator.mediaDevices and getUserMedia() support as well.
+# See also media.navigator.enabled
+- name: media.peerconnection.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.peerconnection.scripttransform.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#ifdef MOZ_WEBRTC
+  # Use MediaDataDecoder API for VP8/VP9 in WebRTC. This includes hardware
+  # acceleration for decoding.
+-   name: media.navigator.mediadatadecoder_vpx_enabled
+    type: RelaxedAtomicBool
+#if defined(NIGHTLY_BUILD) || defined(MOZ_WIDGET_GTK)
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+
+  # Use MediaDataDecoder API for H264 in WebRTC. This includes hardware
+  # acceleration for decoding.
+-   name: media.navigator.mediadatadecoder_h264_enabled
+    type: RelaxedAtomicBool
+  #if defined(_ARM64_) && defined(XP_WIN)
+    value: false
+  #else
+    value: true
+  #endif
+    mirror: always
+
+#if defined(MOZ_WIDGET_GTK)
+  # Use hardware acceleration for VP8 decoding on Linux.
+-   name: media.navigator.mediadatadecoder_vp8_hardware_enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+#endif
+
+  # Interval in milliseconds at which to gather WebRTC stats for use in about:webrtc.
+-   name: media.aboutwebrtc.hist.poll_interval_ms
+    type: RelaxedAtomicUint32
+    value: 250
+    mirror: always
+
+  # History time depth in seconds to keep for webrtc:stats for use in about:webrtc.
+-   name: media.aboutwebrtc.hist.storage_window_s
+    type: RelaxedAtomicUint32
+    value: 60
+    mirror: always
+
+  # Time in minutes to retain peer connection stats after closing.
+-   name: media.aboutwebrtc.hist.prune_after_m
+    type: RelaxedAtomicUint32
+    value: 60 * 24 * 2
+    mirror: always
+
+  # Max number of closed PC stats histories to retain
+-   name: media.aboutwebrtc.hist.closed_stats_to_retain
+    type: RelaxedAtomicUint32
+    value: 8
+    mirror: always
+
+  # Gather PeerConnection stats history for display in about:webrtc. If
+  # disabled history will only gather when about:webrtc is open. Additionally,
+  # if disabled and when about:webrtc is not in the foreground history data
+  # will become sparse.
+-   name: media.aboutwebrtc.hist.enabled
+    type: RelaxedAtomicBool
+#if defined(MOZ_WIDGET_ANDROID)
+    value: false
+#else
+    value: @IS_NIGHTLY_BUILD@
+#endif
+    mirror: always
+
+#endif  # MOZ_WEBRTC
+
+# HTMLMediaElement.allowedToPlay should be exposed to web content when
+# block autoplay rides the trains to release. Until then, Nightly only.
+- name: media.allowed-to-play.enabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Is support for MediaDevices.ondevicechange enabled?
+- name: media.ondevicechange.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Is support for HTMLMediaElement.seekToNextFrame enabled?
+- name: media.seekToNextFrame.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Is the Audio Output Devices API enabled?
+- name: media.setsinkid.enabled
+  type: bool
+#if defined(MOZ_WIDGET_ANDROID)
+  value: false # bug 1473346
+#else
+  value: true
+#endif
+  mirror: always
+
+# Turn on this pref can enable test-only events for media element.
+- name: media.testing-only-events
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.useAudioChannelService.testing
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.audioFocus.management
+  type: bool
+#if defined(MOZ_WIDGET_ANDROID)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.hardwaremediakeys.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# If this pref is on, then `media.mediacontrol.stopcontrol.timer.ms` would take
+# effect and determine the timing to stop controlling media.
+- name: media.mediacontrol.stopcontrol.timer
+  type: bool
+  value: true
+  mirror: always
+
+# If media is being paused after a certain period, then we would think that
+# media doesn't need to be controlled anymore. Therefore, that media would stop
+# listening to the media control key events. The value of this pref is how long
+# media would stop listening to the event after it's paused. The default value
+# is set to 24 hrs (24*60*60*1000)
+- name: media.mediacontrol.stopcontrol.timer.ms
+  type: RelaxedAtomicUint32
+  value: 86400000
+  mirror: always
+
+# If this pref is on, we would stop controlling media after it reaches to the
+# end.
+- name: media.mediacontrol.stopcontrol.aftermediaends
+  type: bool
+  value: true
+  mirror: always
+
+# We would only use media control to control media which duration is longer
+# than this value.
+- name: media.mediacontrol.eligible.media.duration.s
+  type: AtomicFloat
+  value: 3.0f
+  mirror: always
+
+# Encoder creation strategy for WebRTC
+# 0: prefer builtin WebRTC encoder (including OpenH264 via GMP)
+# 1: prefer PlatformEncoderModule
+- name: media.webrtc.encoder_creation_strategy
+  type: RelaxedAtomicUint32
+#ifdef ANDROID
+  value: 1
+#else
+  value: 0
+#endif
+  mirror: always
+
+#if defined(XP_MACOSX)
+- name: media.webrtc.capture.allow-iosurface
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+#endif
+
+#if defined(XP_WIN)
+- name: media.webrtc.capture.allow-directx
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.webrtc.capture.screen.allow-wgc
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.webrtc.capture.window.allow-wgc
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.webrtc.capture.wgc.allow-zero-hertz
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+#endif
+
+#if defined(MOZ_WIDGET_GTK)
+- name: media.webrtc.capture.allow-pipewire
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: media.webrtc.camera.allow-pipewire
+  type: bool
+  value: false
+  mirror: once
+#endif
+
+- name: media.block-autoplay-until-in-foreground
+  type: bool
+#if !defined(MOZ_WIDGET_ANDROID)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.webrtc.hw.h264.enabled
+  type: bool
+#if defined(MOZ_WIDGET_ANDROID)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: media.webrtc.codec.video.av1.enabled
+  type: RelaxedAtomicBool
+#if defined(MOZ_AV1)
+  value: @IS_NIGHTLY_BUILD@
+#else
+  value: false
+#endif
+  mirror: always
+
+# If true, then AV1 will be used as the preferred codec for WebRTC video.
+# After the AV1 codec is enabled by default, this pref will be renamed.
+- name: media.webrtc.codec.video.av1.experimental_preferred
+  type: bool
+  value: false
+  mirror: always
+
+- name: media.webrtc.simulcast.vp9.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: media.webrtc.tls_tunnel_for_all_proxy
+  type: bool
+  value: true
+  mirror: always
+
+- name: media.webrtc.disallow_HTTPS_upgrade_for_TURN
+  type: bool
+  value: true
+  mirror: always
+
+ # If true, then we require explicit approval from the embedding app (ex. Fenix)
+ # on GeckoView to know if we can allow audible, inaudible media or both kinds
+ # of media to autoplay.
+- name: media.geckoview.autoplay.request
+  type: bool
+  value: false
+  mirror: always
+
+ # This is used in testing only, in order to skip the prompting process. This
+ # pref works only when enabling the pref `media.geckoview.autoplay.request`.
+ # 0=prompt as normal, 1=allow all, 2=deny all, 3=allow audible request,
+ # 4=deny audible request, 5=allow inaudible request, 6=deny inaudible request.
+ # 7=leave all requests pending.
+- name: media.geckoview.autoplay.request.testing
+  type: uint32_t
+  value: 0
+  mirror: always
+
+- name: media.mediacontrol.testingevents.enabled
+  type: bool
+  value: false
+  mirror: always
+
+#if defined(XP_MACOSX)
+- name: media.macos.screenrecording.oscheck.enabled
+  type: bool
+  value: true
+  mirror: always
+#endif
+
+# When the playback rate of an HTMLMediaElement is greater than this value, or
+# lower than the inverse of this value, the audio is muted.
+- name: media.audio.playbackrate.muting_threshold
+  type: uint32_t
+  value: 8
+  mirror: always
+
+# The interval of time in milliseconds between attempts to reopen any
+# previously unavailable audio device.
+- name: media.audio.device.retry.ms
+  type: RelaxedAtomicInt32
+  value: 1000
+  mirror: always
+
+# Time-stretch algorithm single processing sequence length in milliseconds.
+# This determines to how long sequences the original sound is chopped in the
+# time-stretch algorithm.
+- name: media.audio.playbackrate.soundtouch_sequence_ms
+  type: RelaxedAtomicInt32
+  value: 10
+  mirror: always
+
+# Time-stretch algorithm seeking window length in milliseconds for algorithm
+# that finds the best possible overlapping location. This determines from how
+# wide window the algorithm may look for an optimal joining location when mixing
+# the sound sequences back together.
+- name: media.audio.playbackrate.soundtouch_seekwindow_ms
+  type: RelaxedAtomicInt32
+  value: 15
+  mirror: always
+
+# Time-stretch algorithm overlap length in milliseconds. When the chopped sound
+# sequences are mixed back together, to form a continuous sound stream, this
+# parameter defines over how long period the two consecutive sequences are let
+# to overlap each other.
+- name: media.audio.playbackrate.soundtouch_overlap_ms
+  type: RelaxedAtomicInt32
+  value: 8
+  mirror: always
+
+# The duration, in milliseconds, of decoded audio to keep around in the
+# AudioSink ring-buffer. New decoding operations are started when this limit is
+# reached. The total size of the ring-buffer is slightly bigger than this.
+- name: media.audio.audiosink.threshold_ms
+  type: AtomicFloat
+#if defined(XP_MACOSX) && defined(MOZ_AARCH64)
+  value: 1000.0
+#else
+  value: 200.0
+#endif
+  mirror: always
+
+- name: media.video-wakelock
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# On Mac, enables using the `<Brand> Media Plugin Helper` executable as the
+# GMP child process instead of the plugin-container executable.
+#if defined(XP_MACOSX)
+-   name: media.plugin_helper_process.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#endif
+
+# When this is true, the protection mask that Firefox replies to Widevine API
+# QueryOutputProtectionStatus is `kProtectionHDCP` when no potential capturing.
+- name: media.widevine.hdcp-protection-mask
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "memory."
+#---------------------------------------------------------------------------
+
+- name: memory.phc.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: memory.phc.min_ram_mb
+  type: uint32_t
+  value: 8000
+  mirror: always
+
+- name: memory.phc.avg_delay.first
+  type: uint32_t
+  value: 65536
+  mirror: always
+
+- name: memory.phc.avg_delay.normal
+  type: uint32_t
+  value: 16384
+  mirror: always
+
+- name: memory.phc.avg_delay.page_reuse
+  type: uint32_t
+  value: 262144
+  mirror: always
+
+- name: memory.phc.avg_delay.content.first
+  type: uint32_t
+  value: 16384
+  mirror: always
+
+- name: memory.phc.avg_delay.content.normal
+  type: uint32_t
+  value: 4096
+  mirror: always
+
+- name: memory.phc.avg_delay.content.page_reuse
+  type: uint32_t
+  value: 262144
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "middlemouse."
+#---------------------------------------------------------------------------
+
+# If set and browser.tabs.opentabfor.middleclick is not set, middle clicking on
+# a link opens the link in a new window.
+- name: middlemouse.openNewWindow
+  type: bool
+#if defined(ANDROID) || !defined(XP_MACOSX) && defined(XP_UNIX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "midi."
+#---------------------------------------------------------------------------
+
+- name: midi.testing
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "mousewheel."
+#---------------------------------------------------------------------------
+
+# This affects how line scrolls from wheel events will be accelerated.
+# Factor to be multiplied for constant acceleration.
+- name: mousewheel.acceleration.factor
+  type: RelaxedAtomicInt32
+  value: 10
+  mirror: always
+
+# This affects how line scrolls from wheel events will be accelerated.
+# Number of mousewheel clicks when acceleration starts.
+# Acceleration can be turned off if pref is set to -1.
+- name: mousewheel.acceleration.start
+  type: RelaxedAtomicInt32
+  value: -1
+  mirror: always
+
+# Auto-dir is a feature which treats any single-wheel scroll as a scroll in the
+# only one scrollable direction if the target has only one scrollable
+# direction. For example, if the user scrolls a vertical wheel inside a target
+# which is horizontally scrollable but vertical unscrollable, then the vertical
+# scroll is converted to a horizontal scroll for that target.
+# Note that auto-dir only takes effect for |mousewheel.*.action|s and
+# |mousewheel.*.action.override_x|s whose values are 1.
+- name: mousewheel.autodir.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# When a wheel scroll is converted due to auto-dir, which side the converted
+# scroll goes towards is decided by one thing called "honoured target". If the
+# content of the honoured target horizontally starts from right to left, then
+# an upward scroll maps to a rightward scroll and a downward scroll maps to a
+# leftward scroll; otherwise, an upward scroll maps to a leftward scroll and a
+# downward scroll maps to a rightward scroll.
+# If this pref is set to false, then consider the scrolling target as the
+# honoured target.
+# If set to true, then consider the root element in the document where the
+# scrolling target is as the honoured target. But note that there's one
+# exception: for targets in an HTML document, the real root element(I.e. the
+# <html> element) is typically not considered as a root element, but the <body>
+# element is typically considered as a root element. If there is no <body>
+# element, then consider the <html> element instead.
+- name: mousewheel.autodir.honourroot
+  type: bool
+  value: false
+  mirror: always
+
+- name: mousewheel.system_scroll_override.enabled
+  type: RelaxedAtomicBool
+#if defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Prefs for overriding the system mouse wheel scrolling speed on
+# content of the web pages.  When
+# "mousewheel.system_scroll_override.enabled" is true and the
+# system scrolling speed isn't customized by the user, the content scrolling
+# speed is multiplied by the following factors.  The value will be used as
+# 1/100.  E.g., 200 means 2.00.
+# NOTE: Even if "mousewheel.system_scroll_override.enabled" is
+# true, when Gecko detects the user customized the system scrolling speed
+# settings, the override isn't executed.
+- name: mousewheel.system_scroll_override.horizontal.factor
+  type: RelaxedAtomicInt32
+  value: 200
+  mirror: always
+- name: mousewheel.system_scroll_override.vertical.factor
+  type: RelaxedAtomicInt32
+  value: 200
+  mirror: always
+
+# Mouse wheel scroll transaction is held even if the mouse cursor is moved.
+- name: mousewheel.transaction.ignoremovedelay
+  type: RelaxedAtomicInt32
+  value: 100
+  mirror: always
+
+# Mouse wheel scroll transaction period of time (in milliseconds).
+- name: mousewheel.transaction.timeout
+  type: RelaxedAtomicInt32
+  value: 1500
+  mirror: always
+
+# Mouse wheel scroll position is determined by GetMessagePos rather than
+# LPARAM msg value
+- name: mousewheel.ignore_cursor_position_in_lparam
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If line-height is lower than this value (in device pixels), 1 line scroll
+# scrolls this height.
+- name: mousewheel.min_line_scroll_amount
+  type: int32_t
+  value: 5
+  mirror: always
+
+# Timeout period (in milliseconds) when the mouse wheel event is no longer
+# handled as the same series.
+- name: mousewheel.scroll_series_timeout
+  type: RelaxedAtomicInt32
+  value: 80
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "mozilla."
+#---------------------------------------------------------------------------
+
+- name: mozilla.widget.raise-on-setfocus
+  type: bool
+  value: true
+  mirror: once
+
+#---------------------------------------------------------------------------
+# Prefs starting with "network."
+#---------------------------------------------------------------------------
+
+# Force less-secure NTLMv1 when needed (NTLMv2 is the default).
+- name: network.auth.force-generic-ntlm-v1
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Sub-resources HTTP-authentication:
+#   0 - don't allow sub-resources to open HTTP authentication credentials
+#       dialogs
+#   1 - allow sub-resources to open HTTP authentication credentials dialogs,
+#       but don't allow it for cross-origin sub-resources
+#   2 - allow the cross-origin authentication as well.
+- name: network.auth.subresource-http-auth-allow
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Sub-resources HTTP-authentication for cross-origin images:
+# - true: It is allowed to present http auth. dialog for cross-origin images.
+# - false: It is not allowed.
+# If network.auth.subresource-http-auth-allow has values 0 or 1 this pref does
+# not have any effect.
+- name: network.auth.subresource-img-cross-origin-http-auth-allow
+  type: bool
+  value: false
+  mirror: always
+
+# Resources that are triggered by some non-web-content:
+# - true: They are allow to present http auth. dialog
+# - false: They are not allow to present http auth. dialog.
+- name: network.auth.non-web-content-triggered-resources-http-auth-allow
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to show anti-spoof confirmation prompts when navigating to a url
+# with userinfo
+- name: network.auth.confirmAuth.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to display auth prompts if X-Frame-Options header will block loading
+# page
+- name: network.auth.supress_auth_prompt_for_XFO_failures
+  type: bool
+  value: true
+  mirror: always
+
+# whether to redirect the channel for auth redirects. See Bug 1820807
+- name: network.auth.use_redirect_for_retries
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# When true, authentication challenges will be sorted even if
+# an authentication is already in progress. This may cause issues sometimes.
+- name: network.auth.sort_challenge_in_progress
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# See the full list of values in nsICookieService.idl.
+- name: network.cookie.cookieBehavior
+  type: RelaxedAtomicInt32
+  value: 0 # accept all cookies
+  mirror: always
+
+# Maximum client-side cookie life-time cap. Measured in seconds, set to 0 to
+# disable.
+- name: network.cookie.maxageCap
+  type: uint32_t
+  value: 34560000
+  mirror: always
+
+# The cookieBehavior to be used in Private Browsing mode.
+- name: network.cookie.cookieBehavior.pbmode
+  type: RelaxedAtomicInt32
+  value: 0 # accept all cookies
+  mirror: always
+
+# Changes cookieBehavior=5 to block third-party cookies by default
+- name: network.cookie.cookieBehavior.optInPartitioning
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Changes cookieBehavior=5 to block third-party cookies in the private browsing
+# mode.
+- name: network.cookie.cookieBehavior.optInPartitioning.pbmode
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Whether to block third-party tracker cookie and storage access when
+# cookieBehavior=5.
+- name: network.cookie.cookieBehavior.trackerCookieBlocking
+  type: bool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
+# Whether to support CHIPS(Cookies Having Independent Partitioned State).
+- name: network.cookie.CHIPS.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Updated to match the target count when we migrate the unpartitioned CHIPS
+# cookies to their first-party partition.
+- name: network.cookie.CHIPS.lastMigrateDatabase
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Used to increase the number of times we want to have migrated the database.
+# This lets us remotely perform a database migration with Nimbus.
+- name: network.cookie.CHIPS.migrateDatabaseTarget
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+
+# Stale threshold for cookies in seconds.
+- name: network.cookie.staleThreshold
+  type: uint32_t
+  value: 60
+  mirror: always
+
+# Enable CHIPS partition byte limit enforcement
+# This pref will only be consulted if CHIPS itself is enabled
+- name: network.cookie.chips.partitionLimitEnabled
+  type: bool
+  value: true
+  mirror: always
+
+# CHIPS partition limit DryRun mode disables purging/rejection
+# but still checks for capacity overflow and reports telemetry
+- name: network.cookie.chips.partitionLimitDryRun
+  type: bool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
+# The actual CHIPS parition limit in bytes
+- name: network.cookie.chips.partitionLimitByteCapacity
+  type: RelaxedAtomicInt32
+  value: 10240 # 10KiB
+  mirror: always
+
+- name: network.cookie.sameSite.laxByDefault
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.cookie.sameSite.laxByDefaultWarningsForBeta
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# lax-by-default 2 minutes tollerance for unsafe methods. The value is in seconds.
+- name: network.cookie.sameSite.laxPlusPOST.timeout
+  type: uint32_t
+  value: 120
+  mirror: always
+
+# For lax-by-default cookies ignore cross-site redirects when the final
+# redirect is same-site again.
+# https://github.com/httpwg/http-extensions/issues/2104
+- name: network.cookie.sameSite.laxByDefault.allowBoomerangRedirect
+  type: bool
+  value: true
+  mirror: always
+
+- name: network.cookie.sameSite.noneRequiresSecure
+  type: bool
+  value: true
+  mirror: always
+
+- name: network.cookie.sameSite.schemeful
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+- name: network.cookie.sameSite.crossSiteIframeSetCheck
+  type: bool
+  value: true
+  mirror: always
+
+# If we should not store "persistent" cookies at all, i.e., make the
+# "persistent" storage be like "private" storage.  This value is only read when
+# instantiating persistent storage for the cookie service, which usually only
+# happens when the cookie service singleton is created.
+- name: network.cookie.noPersistentStorage
+  type: bool
+  value: false
+  mirror: always
+
+# If true then any cookies containing unicode will be rejected
+- name: network.cookie.blockUnicode
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true cookies loaded from the sqlite DB that have a creation or
+# last accessed time that is in the future will be fixed and the
+# timestamps will be set to the current time.
+- name: network.cookie.fixup_on_db_load
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true content types of multipart/x-mixed-replace cannot set a cookie
+- name: network.cookie.prevent_set_cookie_from_multipart
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Use sever time (Date header) to adjust the expire cookie attribute
+- name: network.cookie.useServerTime
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If we should attempt to race the cache and network.
+- name: network.http.rcwn.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: network.http.rcwn.cache_queue_normal_threshold
+  type: uint32_t
+  value: 8
+  mirror: always
+
+- name: network.http.rcwn.cache_queue_priority_threshold
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# We might attempt to race the cache with the network only if a resource
+# is smaller than this size.
+- name: network.http.rcwn.small_resource_size_kb
+  type: uint32_t
+  value: 256
+  mirror: always
+
+- name: network.http.rcwn.min_wait_before_racing_ms
+  type: uint32_t
+  value: 0
+  mirror: always
+
+- name: network.http.rcwn.max_wait_before_racing_ms
+  type: uint32_t
+  value: 500
+  mirror: always
+
+  # Whether to send the Referer header in response to a meta refresh, or
+  # in response to a Refresh header.
+- name: network.http.referer.sendFromRefresh
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# false=real referer, true=spoof referer (use target URI as referer).
+- name: network.http.referer.spoofSource
+  type: bool
+  value: false
+  mirror: always
+
+# Check whether we need to hide referrer when leaving a .onion domain.
+# false=allow onion referer, true=hide onion referer (use empty referer).
+- name: network.http.referer.hideOnionSource
+  type: bool
+  value: true
+  mirror: always
+
+# Include an origin header on non-GET and non-HEAD requests regardless of CORS.
+# 0=never send, 1=send when same-origin only, 2=always send.
+- name: network.http.sendOriginHeader
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Include an idempotency-key header for POST requests
+- name: network.http.idempotencyKey.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Whether to respect the redirected-tainted origin flag
+# https://fetch.spec.whatwg.org/#concept-request-tainted-origin
+- name: network.http.origin.redirectTainted
+  type: bool
+  value: true
+  mirror: always
+
+# If true, cross origin fetch (or XHR) requests would be keyed
+# with a different cache key.
+- name: network.fetch.cache_partition_cross_origin
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true, when browser code itself makes network requests, default to
+# omitting credentials.
+- name: network.fetch.systemDefaultsToOmittingCredentials
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Prefs allowing granular control of referers.
+# 0=don't send any, 1=send only on clicks, 2=send on image requests as well
+- name: network.http.sendRefererHeader
+  type: uint32_t
+  value: 2
+  mirror: always
+  do_not_use_directly: true
+
+# Whether to add urgency and incremental to request headers
+- name: network.http.priority_header.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The maximum allowed length for a referrer header - 4096 default.
+# 0 means no limit.
+- name: network.http.referer.referrerLengthLimit
+  type: uint32_t
+  value: 4096
+  mirror: always
+
+#  0=always send, 1=send iff base domains match, 2=send iff hosts match.
+- name: network.http.referer.XOriginPolicy
+  type: uint32_t
+  value: 0
+  mirror: always
+  do_not_use_directly: true
+
+# 0=full URI, 1=scheme+host+port+path, 2=scheme+host+port.
+- name: network.http.referer.trimmingPolicy
+  type: uint32_t
+  value: 0
+  mirror: always
+  do_not_use_directly: true
+
+# 0=full URI, 1=scheme+host+port+path, 2=scheme+host+port.
+- name: network.http.referer.XOriginTrimmingPolicy
+  type: uint32_t
+  value: 0
+  mirror: always
+  do_not_use_directly: true
+
+# Set the default Referrer Policy; to be used unless overriden by the site.
+# 0=no-referrer, 1=same-origin, 2=strict-origin-when-cross-origin,
+# 3=no-referrer-when-downgrade.
+- name: network.http.referer.defaultPolicy
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Set the default Referrer Policy applied to third-party trackers when the
+# default cookie policy is set to reject third-party trackers, to be used
+# unless overriden by the site.
+# 0=no-referrer, 1=same-origin, 2=strict-origin-when-cross-origin,
+# 3=no-referrer-when-downgrade.
+# Trim referrers from trackers to origins by default.
+- name: network.http.referer.defaultPolicy.trackers
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Set the Private Browsing Default Referrer Policy, to be used
+# unless overriden by the site.
+# 0=no-referrer, 1=same-origin, 2=strict-origin-when-cross-origin,
+# 3=no-referrer-when-downgrade.
+- name: network.http.referer.defaultPolicy.pbmode
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Set to ignore referrer policies which is less restricted than the default for
+# cross-site requests, including 'unsafe-url', 'no-referrer-when-downgrade' and
+# 'origin-when-cross-origin'.
+- name: network.http.referer.disallowCrossSiteRelaxingDefault
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we ignore less restricted referrer policies for top navigations.
+- name: network.http.referer.disallowCrossSiteRelaxingDefault.top_navigation
+  type: bool
+  value: false
+  mirror: always
+
+
+# Set to ignore referrer policies which is less restricted than the default for
+# cross-site requests in the private browsing mode, including 'unsafe-url',
+# 'no-referrer-when-downgrade' and 'origin-when-cross-origin'.
+- name: network.http.referer.disallowCrossSiteRelaxingDefault.pbmode
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we ignore less restricted referrer policies for top navigations in the
+# private browsing mode.
+- name: network.http.referer.disallowCrossSiteRelaxingDefault.pbmode.top_navigation
+  type: bool
+  value: true
+  mirror: always
+
+# Set the Private Browsing Default Referrer Policy applied to third-party
+# trackers when the default cookie policy is set to reject third-party
+# trackers, to be used unless overriden by the site.
+# 0=no-referrer, 1=same-origin, 2=strict-origin-when-cross-origin,
+# 3=no-referrer-when-downgrade.
+# No need to change this pref for trimming referrers from trackers since in
+# private windows we already trim all referrers to origin only.
+- name: network.http.referer.defaultPolicy.trackers.pbmode
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Whether certain http header values should be censored out in logs.
+# Specifically filters out "authorization" and "proxy-authorization".
+- name: network.http.sanitize-headers-in-logs
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether network error logging is enabled.
+- name: network.http.network_error_logging.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether or not we use Windows for SSO to Microsoft sites.
+- name: network.http.windows-sso.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether windows-sso is enabled for the default (0) container.
+# To enable SSO for additional containers, add a new pref like
+# `network.http.windows-sso.container-enabled.${containerId}` = true
+- name: network.http.windows-sso.container-enabled.0
+  type: bool
+  value: true
+  mirror: never
+
+# Whether or not we use MS Entra SSO to network.microsoft-sso-authority-list sites.
+- name: network.http.microsoft-entra-sso.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether microsoft-entra-sso is enabled for the default (0) container.
+# To enable SSO for additional containers, add a new pref like
+# `network.http.microsoft-entra-sso.container-enabled.${containerId}` = true
+- name: network.http.microsoft-entra-sso.container-enabled.0
+  type: bool
+  value: true
+  mirror: never
+
+# To specify the list of trusted Microsoft Single Sign-On (SSO) authority URLs
+# This is needed for macOS unlike Windows where we send every URL to SSO
+- name: network.microsoft-sso-authority-list
+  type: String
+  value: >-
+    login.microsoft.com,
+    login.microsoftonline.com,
+    sts.windows.net,
+    login.partner.microsoftonline.cn,
+    login.chinacloudapi.cn,
+    login.microsoftonline.us,
+    login-us.microsoftonline.com
+  mirror: never
+
+# The factor by which to increase the keepalive timeout when the
+# NS_HTTP_LARGE_KEEPALIVE flag is used for a connection
+- name: network.http.largeKeepaliveFactor
+  type: RelaxedAtomicUint32
+#if defined(ANDROID)
+  value: 10
+#else
+  value: 20
+#endif
+  mirror: always
+
+# Max size, in bytes, for received HTTP response header.
+- name: network.http.max_response_header_size
+  type: RelaxedAtomicUint32
+  value: 393216
+  mirror: always
+
+# Treat all Unicode labels as confusable/unsafe so that they show up
+# as Punycode in the UI.
+- name: network.IDN_show_punycode
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If set to true, IOService.offline depends on IOService.connectivity.
+- name: network.offline-mirrors-connectivity
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If set to true, disallow localhost connections when offline.
+- name: network.disable-localhost-when-offline
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Enables the predictive service.
+- name: network.predictor.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Disable requests to 0.0.0.0
+# See Bug 1889130
+- name: network.socket.ip_addr_any.disabled
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# Set true to allow resolving proxy for localhost
+- name: network.proxy.allow_hijacking_localhost
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# This pref will still treat localhost URLs as secure even when hijacked
+# during testing. This is necessary for automated testing to check that we
+# actually treat localhost as a secure origin.
+- name: network.proxy.testing_localhost_is_secure_when_hijacked
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Allow CookieJarSettings to be unblocked for channels without a document.
+# This is for testing only.
+- name: network.cookieJarSettings.unblocked_for_testing
+  type: bool
+  value: false
+  mirror: always
+
+- name: network.predictor.enable-hover-on-ssl
+  type: bool
+  value: false
+  mirror: always
+
+- name: network.predictor.enable-prefetch
+  type: bool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+- name: network.predictor.page-degradation.day
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.predictor.page-degradation.week
+  type: int32_t
+  value: 5
+  mirror: always
+- name: network.predictor.page-degradation.month
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.predictor.page-degradation.year
+  type: int32_t
+  value: 25
+  mirror: always
+- name: network.predictor.page-degradation.max
+  type: int32_t
+  value: 50
+  mirror: always
+
+- name: network.predictor.subresource-degradation.day
+  type: int32_t
+  value: 1
+  mirror: always
+- name: network.predictor.subresource-degradation.week
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.predictor.subresource-degradation.month
+  type: int32_t
+  value: 25
+  mirror: always
+- name: network.predictor.subresource-degradation.year
+  type: int32_t
+  value: 50
+  mirror: always
+- name: network.predictor.subresource-degradation.max
+  type: int32_t
+  value: 100
+  mirror: always
+
+- name: network.predictor.prefetch-rolling-load-count
+  type: int32_t
+  value: 10
+  mirror: always
+
+- name: network.predictor.prefetch-min-confidence
+  type: int32_t
+  value: 100
+  mirror: always
+- name: network.predictor.preconnect-min-confidence
+  type: int32_t
+  value: 90
+  mirror: always
+- name: network.predictor.preresolve-min-confidence
+  type: int32_t
+  value: 60
+  mirror: always
+
+- name: network.predictor.prefetch-force-valid-for
+  type: int32_t
+  value: 10
+  mirror: always
+
+- name: network.predictor.max-resources-per-entry
+  type: int32_t
+  value: 100
+  mirror: always
+
+# This is selected in concert with max-resources-per-entry to keep memory
+# usage low-ish. The default of the combo of the two is ~50k.
+- name: network.predictor.max-uri-length
+  type: uint32_t
+  value: 500
+  mirror: always
+
+# A testing flag.
+- name: network.predictor.doing-tests
+  type: bool
+  value: false
+  mirror: always
+
+# Indicates whether the `fetchpriority` attribute for elements which support it
+# (e.g. `<script>`) is enabled.
+- name: network.fetchpriority.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# When true, the channel's urgency will be adjusted based on the
+# channel's nsISupportsPriority.
+- name: network.fetchpriority.adjust_urgency
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=script
+# fetchpriority=low/high/auto> and equivalent Link header with respect to the
+# case when network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to HIGHEST.
+# - When the flag is enabled, it respectively maps to LOW/HIGHEST/HIGHEST.
+- name: network.fetchpriority.adjustments.link-preload-script.low
+  type: int32_t
+  value: 30
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-script.high
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-script.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <script type="module"
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.module-script.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.module-script.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.module-script.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of async or defer <script
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.async-or-defer-script.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.async-or-defer-script.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.async-or-defer-script.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <script
+# fetchpriority=low/high/auto> inside the <head>, with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.script-in-head.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.script-in-head.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.script-in-head.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <script
+# fetchpriority=low/high/auto> (other than the scripts handled above) with
+# respect to the case when network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.other-script.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.other-script.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.other-script.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=font
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to HIGH.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/HIGH.
+- name: network.fetchpriority.adjustments.link-preload-font.low
+  type: int32_t
+  value: 20
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-font.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-font.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=fetch
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.link-preload-fetch.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-fetch.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-fetch.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of deferred style for
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/NORMAL/NORMAL.
+- name: network.fetchpriority.adjustments.deferred-style.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.deferred-style.high
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.deferred-style.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=style
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to HIGHEST.
+# - When the flag is enabled, it respectively maps to HIGH/HIGHEST/HIGHEST.
+- name: network.fetchpriority.adjustments.link-preload-style.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-style.high
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-style.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of other non-deferred
+# stylesheet load for fetchpriority=low/high/auto with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to HIGH/HIGHEST/NORMAL.
+- name: network.fetchpriority.adjustments.non-deferred-style.low
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.non-deferred-style.high
+  type: int32_t
+  value: -20
+  mirror: always
+- name: network.fetchpriority.adjustments.non-deferred-style.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of global fetch API
+# for fetchpriority=low/high/auto with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.global-fetch-api.low
+  type: RelaxedAtomicInt32
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.global-fetch-api.high
+  type: RelaxedAtomicInt32
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.global-fetch-api.auto
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=images
+# fetchpriority=low/high/auto> and <img fetchpriority=low/high/auto> with
+# respect to the case when network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to LOW.
+# - When the flag is enabled, it respectively maps to LOW/LOW/HIGH.
+# The image code can currently further adjust the priority for image load, see
+# imgRequest::BoostPriority and AdjustPriorityForImages.
+- name: network.fetchpriority.adjustments.images.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.images.high
+  type: int32_t
+  value: -20
+  mirror: always
+- name: network.fetchpriority.adjustments.images.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <audio>, <track>, <video>,
+# or <link rel=preload as=audio/track/video> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/LOW/HIGH.
+- name: network.fetchpriority.adjustments.media.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.media.high
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.media.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Enables `<link rel="preconnect">` tag and `Link: rel=preconnect` response header
+# handling.
+- name: network.preconnect
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enables `<link rel="modulepreload">` tag and `Link: rel=modulepreload`
+# response header handling.
+- name: network.modulepreload
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enable 103 Early Hint status code (RFC 8297)
+- name: network.early-hints.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enable sending 103 (Early Hints) responses over HTTP/1.1
+- name: network.early-hints.over-http-v1-1.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enable `Link: rel=preconnect` in 103 Early Hint response.
+- name: network.early-hints.preconnect.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The max number of speculative connections we allow for `Link: rel=preconnect`.
+# When 0, the speculative connection created due to `Link: rel=preconnect` will
+# be limited by "network.http.speculative-parallel-limit".
+- name: network.early-hints.preconnect.max_connections
+  type: uint32_t
+  value: 10
+  mirror: always
+
+# How long we should wait for EarlyHintPreloader to be used.
+# Under normal circumstances it should be used immidiately.
+- name: network.early-hints.parent-connect-timeout
+  type: uint32_t
+  value: 10000
+  mirror: always
+
+# Whether to use the network process or not
+# Start a separate socket process. Performing networking on the socket process
+# is control by a sepparate pref
+# ("network.http.network_access_on_socket_process.enabled").
+# Changing these prefs requires a restart.
+- name: network.process.enabled
+  type: RelaxedAtomicBool
+  mirror: always
+#if defined(ANDROID) || defined(MOZ_THUNDERBIRD)
+  value: false # see bug 1641427
+#else
+  value: true
+#endif
+
+# Whether we can send OnDataAvailable to content process directly.
+- name: network.send_ODA_to_content_directly
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we can send OnDataFinished to html5parser in content process directly
+- name: network.send_OnDataFinished.html5parser
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we can send OnDataFinished in the content process
+- name: network.send_OnDataFinished
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we can send OnDataFinished to content process directly.
+- name: network.send_OnDataFinished.nsInputStreamPump
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we can send OnDataFinished to cssLoader in content process.
+- name: network.send_OnDataFinished.cssLoader
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we can send send OnDataFinished only after dispatching
+# all the progress events on the main thread
+- name: network.send_OnDataFinished_after_progress_updates
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Perform all network access on the socket process.
+# The pref requires "network.process.enabled" to be true.
+# Changing these prefs requires a restart.
+- name: network.http.network_access_on_socket_process.enabled
+  type: RelaxedAtomicBool
+  mirror: always
+  value: false
+
+# Telemetry of traffic categories. Whether or not to enable HttpTrafficAnalyzer.
+- name: network.traffic_analyzer.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether DNS resolution is limited to literals and cached entries.
+- name: network.dns.disabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.dns.disablePrefetchFromHTTPS
+  type: bool
+  value: false
+  mirror: always
+
+# For testing purpose only: allow dns prefetch through proxies
+- name: network.dns.prefetch_via_proxy
+  type: bool
+  value: false
+  mirror: always
+
+# Max time to shutdown the resolver threads
+- name: network.dns.resolver_shutdown_timeout_ms
+  type: uint32_t
+  value: 2000
+  mirror: always
+
+# When true on Windows DNS resolutions for single label domains
+# (domains that don't contain a dot) will be resolved using the DnsQuery
+# API instead of PR_GetAddrInfoByName
+- name: network.dns.dns_query_single_label
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Use platform DNS APIs (where available) to resolve HTTPS queries
+- name: network.dns.native_https_query
+  type: RelaxedAtomicBool
+#if !defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# DnsQuery_A is broken for HTTPS queries on Windows 10.
+# Once it gets fixed, we can flip this pref to enable it.
+# Changes might not take effect until restart.
+- name: network.dns.native_https_query_win10
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, the HTTPS query will actually call the native
+# platform API. When false it will return before the call
+# to the platform API
+# This pref is necessary because having a HTTPS record
+# could cause channels to connect to a different port,
+# which is not desirable in automation.
+- name: network.dns.native_https_query_in_automation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When resolving a native HTTPS query with native APIs
+# the Android implementation has a max timeout
+- name: network.dns.native_https_timeout_android
+  type: RelaxedAtomicInt32
+  value: 20000
+  mirror: always
+
+# When this pref is true, we copy the host name to a fresh string before
+# calling into getaddrinfo.
+- name: network.dns.copy_string_before_call
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: network.dns.max_high_priority_threads
+  type: RelaxedAtomicUint32
+  value: 40
+  mirror: always
+
+- name: network.dns.max_any_priority_threads
+  type: RelaxedAtomicUint32
+  value: 24
+  mirror: always
+
+# This makes it so NS_HTTP_REFRESH_DNS is only
+# set on DNS resolutions when LOAD_FRESH_CONNECTION is set.
+# That's because we don't need to refresh DNS on
+# every page reload.
+- name: network.dns.only_refresh_on_fresh_connection
+  type: RelaxedAtomicBool
+#ifdef EARLY_BETA_OR_EARLIER
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# When true, DNS resolutions will downgrade DNS
+# from AF_UNSPEC to AF_INET when no non-local IPv6 addresses are
+# available.
+- name: network.dns.skip_ipv6_when_no_addresses
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# This preference specifies a list of domains for which DNS lookups will be
+# IPv4 only. Works around broken DNS servers which can't handle IPv6 lookups
+# and/or allows the user to disable IPv6 on a per-domain basis. See bug 68796.
+- name: network.dns.ipv4OnlyDomains
+  type: String
+  value: ""
+  mirror: never
+
+# This is the number of dns cache entries allowed
+- name: network.dnsCacheEntries
+  type: RelaxedAtomicUint32
+  value: 400
+  mirror: always
+
+# In the absence of OS TTLs, the DNS cache TTL value
+- name: network.dnsCacheExpiration
+  type: RelaxedAtomicUint32
+  value: 60
+  mirror: always
+
+# Get TTL; not supported on all platforms; nop on the unsupported ones.
+- name: network.dns.get-ttl
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# For testing purposes! Makes the native resolver resolve IPv4 "localhost"
+# instead of the actual given name.
+- name: network.dns.native-is-localhost
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# The grace period allows the DNS cache to use expired entries, while kicking off
+# a revalidation in the background.
+- name: network.dnsCacheExpirationGracePeriod
+  type: RelaxedAtomicUint32
+  value: 60
+  mirror: always
+
+# This preference can be used to turn off DNS prefetch.
+- name: network.dns.disablePrefetch
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# This preference controls whether .onion hostnames are
+# rejected before being given to DNS. RFC 7686
+- name: network.dns.blockDotOnion
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# These domains are treated as localhost equivalent
+- name: network.dns.localDomains
+  type: String
+  value: ""
+  mirror: never
+
+# When non empty all non-localhost DNS queries (including IP addresses)
+# resolve to this value. The value can be a name or an IP address.
+# domains mapped to localhost with localDomains stay localhost.
+- name: network.dns.forceResolve
+  type: String
+  value: ""
+  mirror: never
+
+# Contols whether or not "localhost" should resolve when offline
+- name: network.dns.offline-localhost
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Defines how much longer resolver threads should stay idle before are shut down.
+# A negative value will keep the thread alive forever.
+- name: network.dns.resolver-thread-extra-idle-time-seconds
+  type: RelaxedAtomicInt32
+  value: 60
+  mirror: always
+
+# The proxy type. See nsIProtocolProxyService.idl
+#     PROXYCONFIG_DIRECT   = 0
+#     PROXYCONFIG_MANUAL   = 1
+#     PROXYCONFIG_PAC      = 2
+#     PROXYCONFIG_WPAD     = 4
+#     PROXYCONFIG_SYSTEM   = 5
+- name: network.proxy.type
+  type: RelaxedAtomicUint32
+  value: 5
+  mirror: always
+
+# Whether to use WPAD while configuring proxy with system settings
+- name: network.proxy.system_wpad
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to allow the use of WPAD while configuring proxy with system settings
+- name: network.proxy.system_wpad.allowed
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the SOCKS5 proxy should be in charge of DNS resolution. Making it a
+# SOCKS5h proxy by convention
+- name: network.proxy.socks5_remote_dns
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether the SOCKS4 proxy should be in charge of DNS resolution. Making it a
+# SOCKS4a proxy.
+- name: network.proxy.socks_remote_dns
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When receiving a network change event, the time (in ms) we wait to reload the
+# PAC url.
+- name: network.proxy.reload_pac_delay
+  type: RelaxedAtomicUint32
+  value: 2000
+  mirror: always
+
+# When parsing "SOCKS" in PAC string, the default version of SOCKS that will be
+# used.
+- name: network.proxy.default_pac_script_socks_version
+  type: RelaxedAtomicUint32
+  value: 4
+  mirror: always
+
+# Whether to force failover to direct for system requests.
+#ifdef MOZ_PROXY_DIRECT_FAILOVER
+- name: network.proxy.failover_direct
+  type: bool
+  value: true
+  mirror: always
+#endif
+
+# Whether to allow a bypass flag to be set on httpChannel that will
+# prevent proxies from being used for that specific request.
+- name: network.proxy.allow_bypass
+  type: bool
+#ifdef MOZ_PROXY_BYPASS_PROTECTION
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+- name: network.proxy.parse_pac_on_socket_process
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.proxy.detect_system_proxy_changes
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If all non-direct proxies have failed, we retry all of them in case they
+# are online now.
+- name: network.proxy.retry_failed_proxies
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Some requests during a page load are marked as "tail", mainly trackers, but not only.
+# This pref controls whether such requests are put to the tail, behind other requests
+# emerging during page loading process.
+- name: network.http.tailing.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Priority urgency of tailed request. Default to 6, which is a very low priority
+- name: network.http.tailing.urgency
+  type: RelaxedAtomicUint32
+  value: 6
+  mirror: always
+
+# Tailing: When the page load has not yet reached DOMContentLoaded point, tail requestes are delayed
+# by (non-tailed requests count + 1) * delay-quantum milliseconds.
+- name: network.http.tailing.delay-quantum
+  type: int32_t
+  value: 600
+  mirror: always
+
+# Tailing: The same as above, but applied after the document load reached DOMContentLoaded event.
+- name: network.http.tailing.delay-quantum-after-domcontentloaded
+  type: int32_t
+  value: 100
+  mirror: always
+
+# Tailing: Upper limit for the calculated delay, prevents long standing and comet-like requests tail forever.  This is in milliseconds as well.
+- name: network.http.tailing.delay-max
+  type: int32_t
+  value: 6000
+  mirror: always
+
+# Tailing: Total limit we delay tailed requests since a page load beginning.
+- name: network.http.tailing.total-max
+  type: int32_t
+  value: 45000
+  mirror: always
+
+# When true, the default Accept request header will include the supported mime
+# types for images.
+- name: network.http.accept_include_images
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to run proxy checks when processing Alt-Svc headers.
+- name: network.http.altsvc.proxy_checks
+  type: bool
+  value: true
+  mirror: always
+
+- name: network.http.stale_while_revalidate.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Capacity of the above cache, in kilobytes.
+- name: network.ssl_tokens_cache_capacity
+  type: RelaxedAtomicUint32
+  value: 2048
+  mirror: always
+
+# How many records we store per entry
+- name: network.ssl_tokens_cache_records_per_entry
+  type: RelaxedAtomicUint32
+  value: 2
+  mirror: always
+
+# The maximum allowed length for a URL - 1MB default.
+- name: network.standard-url.max-length
+  type: RelaxedAtomicUint32
+  value: 1048576
+  mirror: always
+
+# DNS Trusted Recursive Resolver
+# 0 - default off, 1 - reserved/off, 2 - TRR first, 3 - TRR only,
+# 4 - reserved/off, 5 off by choice
+- name: network.trr.mode
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Default global TRR provider
+- name: network.trr.default_provider_uri
+  type: String
+  value: "https://mozilla.cloudflare-dns.com/dns-query"
+  mirror: never
+
+# If true, retry TRR for recoverable errors once.
+- name: network.trr.retry_on_recoverable_errors
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true, don't fallback to native DNS upon network errors.
+- name: network.trr.strict_native_fallback
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true, we'll fallback to native if the retry also times out.
+- name: network.trr.strict_native_fallback_allow_timeouts
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Single TRR request timeout (ms) when strict native fallback is enabled.
+- name: network.trr.strict_fallback_request_timeout_ms
+  type: RelaxedAtomicUint32
+  value: 6000
+  mirror: always
+
+# If false, the temporary blocklisting feature is disabled.
+# This is useful for tests to prevent bleeding extra reqs
+# between tasks, since we may attempt to look up the
+# parent domain in the background when blocklisting a host.
+- name: network.trr.temp_blocklist
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# TRR blocklist entry expire time (in seconds). Default is one minute.
+# Meant to survive basically a page load.
+- name: network.trr.temp_blocklist_duration_sec
+  type: RelaxedAtomicUint32
+  value: 60
+  mirror: always
+
+# Single TRR request timeout, in milliseconds
+- name: network.trr.request_timeout_ms
+  type: RelaxedAtomicUint32
+  value: 1500
+  mirror: always
+
+# Single TRR request timeout, in milliseconds for mode 3
+- name: network.trr.request_timeout_mode_trronly_ms
+  type: RelaxedAtomicUint32
+  value: 30000
+  mirror: always
+
+# Similar to network.http.http2.ping-timeout, but this is used when the
+# Http/2 connection is connected to the TRR server.
+- name: network.trr.ping_timeout
+  type: RelaxedAtomicUint32
+  value: 3000
+  mirror: always
+
+# The timeout of the TRR confirmation request
+- name: network.trr.confirmation_timeout_ms
+  type: RelaxedAtomicUint32
+  value: 6000
+  mirror: always
+
+# The timeout of the TRR confirmation request
+- name: network.trr.confirmation_telemetry_enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to send the Accept-Language header for TRR requests
+- name: network.trr.send_accept-language_headers
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to send an empty Accept-Encoding header for TRR requests
+- name: network.trr.send_empty_accept-encoding_headers
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to send the User-Agent header for TRR requests
+- name: network.trr.send_user-agent_headers
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If we should wait for captive portal confirmation before enabling TRR
+- name: network.trr.wait-for-portal
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If we should wait for TRR service confirmation to complete before enabling
+# TRR for lookups when fallback is enabled. Confirmation is always skipped when
+# global mode is TRR-only (no fallback).
+- name: network.trr.wait-for-confirmation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Normally when confirmation fails we wait for the confirmation to succeed
+# before attempting to do TRR. When this pref is true, we optimistically
+# assume the confirmation will succeed and might attempt TRR anyway.
+# If network.trr.wait-for-confirmation is true, this pref is ignored.
+- name: network.trr.attempt-when-retrying-confirmation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Use GET (rather than POST)
+- name: network.trr.useGET
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Allow RFC1918 address in responses?
+- name: network.trr.allow-rfc1918
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, it only sends AAAA when the system has IPv6 connectivity
+- name: network.trr.skip-AAAA-when-not-supported
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to apply split horizon mitigations when using TRR.
+# These include adding the DNS suffix to the excluded domains
+- name: network.trr.split_horizon_mitigations
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Explicitly disable ECS (EDNS Client Subnet, RFC 7871)
+- name: network.trr.disable-ECS
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# When true, the DNS+TRR cache will be cleared when a relevant TRR pref
+# changes. (uri, bootstrapAddress, excluded-domains)
+- name: network.trr.clear-cache-on-pref-change
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# After this many failed TRR requests in a row, consider TRR borked
+- name: network.trr.max-fails
+  type: RelaxedAtomicUint32
+  value: 15
+  mirror: always
+
+# When the TRR confirmation is set to CONFIRM_FAILED due to many failures in
+# a row, we set a timer to retry. This has an exponential backoff up to
+# network.trr.max-retry-timeout-ms (64 seconds by default)
+- name: network.trr.retry-timeout-ms
+  type: RelaxedAtomicUint32
+  value: 125
+  mirror: always
+
+- name: network.trr.max-retry-timeout-ms
+  type: RelaxedAtomicUint32
+  value: 64000
+  mirror: always
+
+# Retry with no TRR when the response contained only 0.0.0.0 or ::
+- name: network.trr.fallback-on-zero-response
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true we parse the /etc/hosts file and exclude any host names from TRR.
+# Reading the file is only done once, when TRR is first enabled - this could be
+# soon after startup or when the pref is flipped.
+- name: network.trr.exclude-etc-hosts
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to add padding in the doh dns queries (rfc 7830)
+- name: network.trr.padding
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The block size to pad to. Capped at 1024 bytes.
+# Setting it to 0 doesn't add additional padding, but allows the server to
+# respond with padding (RFC7930 Sec 4)
+- name: network.trr.padding.length
+  type: RelaxedAtomicUint32
+  value: 128
+  mirror: always
+
+# Whether to skip the NS check for the blocked host.
+# Note this is used for test only.
+- name: network.trr.skip-check-for-blocked-host
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to use the connection info that is generated asynchronously.
+- name: network.trr.async_connInfo
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If true, a failed TRR request that contains an extended DNS error
+# matching the hardFail condition in DNSPacket.cpp will not be
+# retried with native DNS
+- name: network.trr.hard_fail_on_extended_error
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The base URL of the `Learn more` button for skip reasons
+- name: network.trr_ui.skip_reason_learn_more_url
+  type: String
+  value: "https://firefox-source-docs.mozilla.org/networking/dns/trr-skip-reasons.html#"
+  mirror: never
+
+# If true, display a warning before fallback to native
+- name: network.trr.display_fallback_warning
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Heuristics in this list will trigger the fallback to native warning
+- name: network.trr.fallback_warning_heuristic_list
+  type: String
+  value: "canary"
+  mirror: never
+
+# Use Oblivious HTTP when making TRR requests.
+- name: network.trr.use_ohttp
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Oblivious HTTP relay URI for TRR requests.
+- name: network.trr.ohttp.relay_uri
+  type: String
+  value: ""
+  mirror: never
+
+# URI from which to fetch the configuration for the Oblivious HTTP gateway for TRR requests.
+- name: network.trr.ohttp.config_uri
+  type: String
+  value: ""
+  mirror: never
+
+# The URI used for the target DoH server when network.trr.use_ohttp is true
+- name: network.trr.ohttp.uri
+  type: String
+  value: ""
+  mirror: never
+
+# Allow the network changed event to get sent when a network topology or setup
+# change is noticed while running.
+- name: network.notify.changed
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Allow network detection of IPv6 related changes (bug 1245059)
+- name: network.notify.IPv6
+  type: RelaxedAtomicBool
+#ifdef XP_WIN
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# Whether to check the dnsSuffix on network changes
+- name: network.notify.dnsSuffixList
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to check the registry for proxies on network changes that indicate
+# that TRR should not be used.
+- name: network.notify.checkForProxies
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to check the registry for NRPT rules on network changes that
+# indicate that TRR should not be used.
+- name: network.notify.checkForNRPT
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether NotifyIpInterfaceChange should be called immediately after
+# registration in order to record the initial state of the network adapters.
+- name: network.notify.initial_call
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to check for DNS resolvers
+- name: network.notify.resolvers
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to use the rust implemented DefaultURI for unknown scheme types
+- name: network.url.useDefaultURI
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Allows use of a protocol exception list that will bypass defaultURI parser
+- name: network.url.simple_uri_unknown_schemes_enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Without this my windows build crashes
+- name: "network.url.strict_data_url_base64_placement"
+  type: bool
+  value: false
+  mirror: always
+
+# A list of schemes to allow for bypassing defaultURI as default
+# This is only used when network.url.simple_uri_unknown_schemes_enabled is true
+- name: network.url.simple_uri_unknown_schemes
+  type: String
+  value: ""
+  mirror: never
+
+# The maximum allowed length for a URL - 32MB default.
+# If 0 that means no limit.
+- name: network.url.max-length
+  type: RelaxedAtomicUint32
+  value: 32 * 1024 * 1024
+  mirror: always
+
+# When true, if all the cyrillic characters in a label
+# are latin confusables and on a non-cyrillic domain
+# the label will be displayed as punycode.
+- name: network.idn.punycode_cyrillic_confusables
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Force remapping of remote port numbers to allow reaching local testing
+# servers or port forwarders listening on non-standard ports.  Note that
+# this is not changing the origin URL in the addressbar, only internally
+# the port number used.  This is intended to be used along with the
+# `network.dns.forceResolve` preference.
+#
+# The form is:
+#   "80,443,808-888=8080; 563=8081"
+# this will remap ports for HTTP, HTTPS and the range of 808-888 included
+# to use port 8080, and port 563 to go to 8081.
+- name: network.socket.forcePort
+  type: String
+  value: ""
+  mirror: never
+
+# Try and use HTTP2 when using SSL
+- name: network.http.http2.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: network.http.http2.enabled.deps
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, Firefox will send Extensivle prioritization scheme
+# PRIORITY_UPDATE frames.
+- name: network.http.http2.priority_updates
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# This pref controls whether to send the
+# SETTINGS_NO_RFC7540_PRIORITIES when stream dependencies
+# are disabled, and extensible prioritization scheme is in use.
+# defaults to false as some servers panic when they see this (bug 1928600)
+- name: network.http.http2.send_NO_RFC7540_PRI
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# This pref controls whether to send PRIORITY_UPDATE
+# frames for pushed streams.
+- name: network.http.http2.push_priority_update
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.http.http2.enforce-tls-profile
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: network.http.http2.chunk-size
+  type: RelaxedAtomicInt32
+  value: 16000
+  mirror: always
+
+- name: network.http.http2.timeout
+  type: RelaxedAtomicInt32
+  value: 170
+  mirror: always
+
+- name: network.http.http2.coalesce-hostnames
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# When true, origin A and origin B will be coalesced if they have an overlap
+# in IP addresses as advertized by DNS, regardless if the existing connection
+# to origin A is not to an IP present in B's DNS response.
+# When false, an existing connection will only be reused if the
+# connection's remote IP is also present in B's DNS response.
+- name: network.http.http2.aggressive_coalescing
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.http.http2.ping-threshold
+  type: RelaxedAtomicInt32
+  value: 58
+  mirror: always
+
+- name: network.http.http2.ping-timeout
+  type: RelaxedAtomicInt32
+  value: 8
+  mirror: always
+
+- name: network.http.http2.send-buffer-size
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: network.http.http2.allow-push
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, Firefox will send a SETTINGS_MAX_CONCURRENT_STREAMS
+# parameter when push is disabled. Chrome doesn't send this,
+# so some servers misbehave when we do. See Bug 1919750.
+- name: network.http.http2.send-push-max-concurrent-frame
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.http.http2.push-allowance
+  type: RelaxedAtomicInt32
+  value: 131072  # 128KB
+  mirror: always
+
+- name: network.http.http2.pull-allowance
+  type: RelaxedAtomicInt32
+  value: 12582912  # 12MB
+  mirror: always
+
+- name: network.http.http2.default-concurrent
+  type: RelaxedAtomicInt32
+  value: 100
+  mirror: always
+
+- name: network.http.http2.default-hpack-buffer
+  type: RelaxedAtomicInt32
+  value: 65536 # 64K
+  mirror: always
+
+- name: network.http.http2.websockets
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: network.http.http2.enable-hpack-dump
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.http.move_to_pending_list_after_network_change
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Without this my windows build crashes
+- name: "network.http.http2_move_to_pending_list_after_network_change"
+  type: bool
+  value: false
+  mirror: always
+
+# Enable HTTP/3
+- name: network.http.http3.enable
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Receive buffer size of QUIC socket
+- name: network.http.http3.recvBufferSize
+  type: RelaxedAtomicInt32
+  value: 1048576
+  mirror: always
+
+# Use NSPR for HTTP3 UDP IO
+- name: network.http.http3.use_nspr_for_io
+  type: RelaxedAtomicBool
+  value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# Send and receive IP ECN marks. Noop if network.http.http3.use_nspr_for_io is
+# true.
+- name: network.http.http3.ecn
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+  rust: true
+
+- name: network.http.http3.enable_qlog
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.http.http3.enable_0rtt
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# When a h3 transaction is inserted in the pending queue, the time (ms) we wait
+# to create a TCP backup connection.
+- name: network.http.http3.backup_timer_delay
+  type: RelaxedAtomicUint32
+  value: 100
+  mirror: always
+
+# The global half open sockets allowed for creating a backup connection.
+- name: network.http.http3.parallel_fallback_conn_limit
+  type: RelaxedAtomicUint32
+  value: 32
+  mirror: always
+
+# Connection-level flow control limit
+- name: network.http.http3.max_data
+  type: RelaxedAtomicUint32
+  value: 25165824
+  mirror: always
+
+# Stream-level flow control limit
+- name: network.http.http3.max_stream_data
+  type: RelaxedAtomicUint32
+  value: 12582912
+  mirror: always
+
+# Enable http3 network priority as described in
+# <https://www.rfc-editor.org/rfc/rfc9218.html>.
+- name: network.http.http3.priority
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Depriorizing background tabs notifies websites when switching to or from the
+# tab while still loading resources for the website. On one hand it might
+# improve performance when switching to an tab with a website using the same
+# QUIC connection. On the other hand it sends more data to the website and
+# might be a privacy concern.
+- name: network.http.http3.send_background_tabs_deprioritization
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.http.http3.version_negotiation.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When a Http/3 connection failed, whether to retry with a different IP address.
+- name: network.http.http3.retry_different_ip_family
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# This is for testing purpose. When true, nsUDPSocket::SendWithAddress and
+# neqo_http3conn_process_output_and_send will return NS_ERROR_CONNECTION_REFUSED
+# for address "::1".
+- name: network.http.http3.block_loopback_ipv6_addr
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# The congestion control algorithm with which to configure neqo.
+# 0 => NewReno
+# 1 => Cubic
+- name: network.http.http3.cc_algorithm
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+  rust: true
+
+# It represents the maximum duration that we used to accumulate
+# callback timeouts before we set a timer and break out of the loop.
+- name: network.http.http3.max_accumlated_time_ms
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+  rust: true
+
+# Whether to send an mlkem768x25519 key share in HTTP/3 TLS handshakes.
+# Has no effect unless security.tls.enable_kyber is true.
+- name: network.http.http3.enable_kyber
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+  rust: true
+
+# When true, HTTP/3 will be disabled when third party roots are found.
+- name: network.http.http3.disable_when_third_party_roots_found
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Only used for testing purposes. In automation, this value is used to override
+# the result of third party roots check.
+- name: network.http.http3.has_third_party_roots_found_in_automation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When network.http.http3.alt-svc-mapping-for-testing is set, only use
+# HTTP/3 to connect.
+- name: network.http.http3.force-use-alt-svc-mapping-for-testing
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, a http request will be upgraded to https when HTTPS RR is
+# available.
+- name: network.dns.upgrade_with_https_rr
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to use HTTPS RR as AltSvc
+- name: network.dns.use_https_rr_as_altsvc
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to check for NAT64 using the system resolver
+- name: network.connectivity-service.nat64-check
+  type: bool
+  value: true
+  mirror: always
+
+# Manually enter the NAT64 prefix that will be used if IPv4 is unavailable.
+# The value is formatted as IPv6 with the least significant bits to be dropped.
+# For example, 64:ff9b:: is a common prefix. This will not disable
+# the NAT64 check, although the value of this pref will be prioritized.
+- name: network.connectivity-service.nat64-prefix
+  type: String
+  value: ""
+  mirror: never
+
+# Whether to enable echconfig.
+- name: network.dns.echconfig.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to enable echconfig for http3.
+- name: network.dns.http3_echconfig.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# This pref needs to be worked together with network.dns.echconfig.enabled
+# being true and there is no record without ECHConfig.
+# When we try all records with ECHConfig in HTTPS RRs and still can't connect,
+# this pref indicate whether we can fallback to the origin server.
+- name: network.dns.echconfig.fallback_to_origin_when_all_failed
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, reset the exclusion list when all records are excluded.
+- name: network.dns.httpssvc.reset_exclustion_list
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If the http3 connection cannot be ready after the timeout value here, the
+# transaction will start another non-http3 conneciton.
+# Setting this value to 0 indicates this feature is disabled.
+- name: network.dns.httpssvc.http3_fast_fallback_timeout
+  type: RelaxedAtomicUint32
+  value: 50
+  mirror: always
+
+# The TTL for negative responses of TXT and HTTPS records.
+- name: network.dns.negative_ttl_for_type_record
+  type: RelaxedAtomicUint32
+  value: 300   # 5 minutes (in seconds)
+  mirror: always
+
+# Whether to use port prefixed QNAME for HTTPS RR
+- name: network.dns.port_prefixed_qname_https_rr
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to use HTTPS RR and ignore NS_HTTP_DISALLOW_HTTPS_RR
+# This pref is only set when running tests
+- name: network.dns.force_use_https_rr
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# When true, we check if the cname is the same as the target name of the record.
+# If not, the record will not be used.
+- name: network.dns.https_rr.check_record_with_cname
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# This preference can be used to turn off IPv6 name lookups. See bug 68796.
+- name: network.dns.disableIPv6
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to prefer IPv6 name lookups.
+- name: network.dns.preferIPv6
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Only used for testing
+- name: network.dns.mock_HTTPS_RR_domain
+  type: String
+  value: ""
+  mirror: never
+
+# Without this my windows build crashes
+- name: "network.dns.use_override_as_peer_address"
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to add additional record IPs to the cache
+- name: network.trr.add_additional_records
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# When this pref is true, AddStorageEntry will return an error if the
+# OPEN_READONLY & OPEN_SECRETLY flags are passed and no entry exists.
+# If no regressions occur this pref should be removed.
+- name: network.cache.bug1708673
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# How much progress we want to do minimum when purging under pressure.
+# On disk, we may see blocking I/O, so for now we keep 0 here.
+- name: network.cache.purge_minprogress_disk
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# How much progress we want to do minimum when purging under pressure.
+# In memory, purging is cheap and memory is precious.
+- name: network.cache.purge_minprogress_memory
+  type: RelaxedAtomicUint32
+  value: 32
+  mirror: always
+
+# When true we will dispatch a background task (separate process) to
+# delete the cache folder at shutdown in order to avoid shutdown hangs.
+- name: network.cache.shutdown_purge_in_background_task
+  type: RelaxedAtomicBool
+#if defined(XP_WIN)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Number of seconds to wait for the cache folder to be renamed before
+# the background task forcefully exists.
+- name: network.cache.shutdown_purge_folder_wait_seconds
+  type: RelaxedAtomicUint32
+  value: 10
+  mirror: always
+
+- name: network.cache.persist_permanent_redirects_http
+  type: bool
+  value: false
+  mirror: always
+
+# This is used for a temporary workaround for a web-compat issue. If pref is
+# true CORS preflight requests are allowed to send client certificates.
+- name: network.cors_preflight.allow_client_cert
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to record the telemetry event when a JAR channel is failed to load.
+- name: network.jar.record_failure_reason
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+# nsJARInputStream::Available returns the size indicated by the archived entry
+# so we need a limit so we don't OOM if the archive is corrupted.
+- name: network.jar.max_available_size
+  type: RelaxedAtomicUint32
+  value: 256*1024*1024 # 256 Mb
+  mirror: always
+
+# When decompressing an archived entry we need to allocate a buffer
+# large enough to hold the uncompressed entry. This pref specifies the max
+# size of such a buffer.
+# When set to 0 there is no limit.
+- name: network.jar.max_entry_size
+  type: RelaxedAtomicUint32
+  value: 256*1024*1024 # 256 Mb
+  mirror: always
+
+# When this pref is true, we will use the HTTPS acceptable content encoding
+# list for trustworthy domains such as http://localhost
+- name: network.http.encoding.trustworthy_is_https
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Support http3 version1
+- name: network.http.http3.support_version1
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Disable early data on an origin if SSL_ERROR_PROTOCOL_VERSION_ALERT is received
+- name: network.http.early_data_disable_on_error
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Disable early data if it fails for more than this number of origins
+- name: network.http.early_data_max_error
+  type: RelaxedAtomicUint32
+  value: 5
+  mirror: always
+
+# If true, remove the resumption token when 0RTT failed.
+- name: network.http.remove_resumption_token_when_early_data_failed
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+  # The length of cnonce string used in HTTP digest auth.
+- name: network.http.digest_auth_cnonce_length
+  type: uint32_t
+  value: 16
+  mirror: always
+
+# When a primary or backup half-open socket fails while another is still
+# connecting, retry with the remaining one
+- name: network.http.retry_with_another_half_open
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+  # If true, HTTP response content-type headers will be parsed using the standards-compliant MimeType parser
+- name: network.standard_content_type_parsing.response_headers
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The maximum count that we allow socket prrocess to crash. If this count is
+# reached, we won't use networking over socket process.
+- name: network.max_socket_process_failed_count
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+
+- name: network.allow_redirect_to_data
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: network.allow_raw_sockets_in_content_processes
+  type: bool
+  value: false
+  mirror: once
+
+- name: network.allow_large_stack_size_for_socket_thread
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# WebTransport
+- name: network.webtransport.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# WebTransport Datagram support
+- name: network.webtransport.datagrams.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# WebTransport Datagram size
+- name: network.webtransport.datagram_size
+  type: RelaxedAtomicUint32
+  value: 1200
+  mirror: always
+
+# WebTransport Redirect support
+- name: network.webtransport.redirect.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Wifi-scan polling period, in ms, when on a mobile network.
+# A value of 0 indicates that no polling should be done.
+- name: network.wifi.scanning_period
+  type: RelaxedAtomicUint32
+  value: 60000
+  mirror: always
+
+# When the Access-Control-Allow-Headers is wildcard (*), whether to allow
+# CORS-protected requests with the Authorization request header.
+- name: network.cors_preflight.authorization_covered_by_wildcard
+  type: bool
+  value: true
+  mirror: always
+
+# Inner schemes that are allowed to display application/http-index-format.
+# Set to * to allow all schemes.
+- name: network.http_index_format.allowed_schemes
+  type: String
+  value: "file,moz-gio"
+  mirror: never
+
+# Enable off-main-thread decompression of network streams
+# Note:network.decompression_off_mainthread triggered a bug, so
+# we switched to a new pref that can be turned off safely
+- name: network.decompression_off_mainthread2
+  type: bool
+  value: true
+  mirror: always
+
+# Minimum content-length to use off-main-thread decompression of network streams
+- name: network.decompression_off_mainthread_min_size
+  type: int32_t
+  value: 512
+  mirror: always
+
+# Cached state of parental controls (enabled/disabled)
+- name: network.parental_controls_cached_state
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Used for testing purposes only. When true, it attaches an extra networking
+# layer to simulate different network scenarios.
+- name: network.socket.attach_mock_network_layer
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "nglayout."
+#---------------------------------------------------------------------------
+
+# Enable/disable display list invalidation logging --- useful for debugging.
+- name: nglayout.debug.invalidation
+  type: bool
+  value: false
+  mirror: always
+
+- name: nglayout.debug.disable_xul_cache
+  type: bool
+  value: false
+  mirror: always
+
+- name: nglayout.initialpaint.delay
+  type: int32_t
+  value: 5
+  mirror: always
+
+- name: nglayout.initialpaint.delay_in_oopif
+  type: int32_t
+  value: 5
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "page_load."
+#---------------------------------------------------------------------------
+
+# Time in milliseconds during which certain tasks are deprioritized during
+# page load.
+- name: page_load.deprioritization_period
+  type: RelaxedAtomicUint32
+  value: 5000
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "pdfjs."
+#---------------------------------------------------------------------------
+
+- name: pdfjs.disabled
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "permissions."
+#---------------------------------------------------------------------------
+
+# 1-Accept, 2-Deny, Any other value: Accept
+- name: permissions.default.image
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+
+- name: permissions.default.screen-wake-lock
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+
+- name: permissions.isolateBy.userContext
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: permissions.isolateBy.privateBrowsing
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Is support for Permissions.query enabled for camera and microphone?
+- name: permissions.media.query.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether default permissions should be imported from remote settings in
+# addition to importing them from browser/app/permissions.
+- name: permissions.manager.remote.enabled
+  type: bool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "places."
+#---------------------------------------------------------------------------
+
+# Whether pages alternative frecency is enabled. This and the following related
+# prefs only apply at restart.
+- name: places.frecency.pages.alternative.featureGate
+  type: bool
+  value: false
+  mirror: once
+
+- name: places.frecency.pages.alternative.highWeight
+  type: uint32_t
+  value: 100
+  mirror: once
+
+- name: places.frecency.pages.alternative.mediumWeight
+  type: uint32_t
+  value: 50
+  mirror: once
+
+- name: places.frecency.pages.alternative.lowWeight
+  type: uint32_t
+  value: 20
+  mirror: once
+
+- name: places.frecency.pages.alternative.halfLifeDays
+  type: uint32_t
+  value: 30
+  mirror: once
+
+- name: places.frecency.pages.alternative.numSampledVisits
+  type: uint32_t
+  value: 10
+  mirror: once
+
+# Whether flooding prevention feature is enabled or not.
+- name: places.history.floodingPrevention.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Maximum elapsed time betwen a user interaction and a visit before starting to
+# apply flooding prevention.
+- name: places.history.floodingPrevention.maxSecondsFromLastUserInteraction
+  type: uint32_t
+  value: 3
+  mirror: always
+
+# Number of consecutive accesses to an origin in a short timeframe before
+# starting to restrict storing visits for it.
+- name: places.history.floodingPrevention.restrictionCount
+  type: uint32_t
+  value: 3
+  mirror: always
+
+# Duration of the timeframe where consecutive visits to an origin should happen
+# before starting to restrict storing visits for it.
+- name: places.history.floodingPrevention.restrictionExpireSeconds
+  type: uint32_t
+  value: 5
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "plain_text."
+#---------------------------------------------------------------------------
+
+# When false, text in plaintext documents does not wrap long lines.
+- name: plain_text.wrap_long_lines
+  type: bool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "preferences."
+#---------------------------------------------------------------------------
+
+- name: preferences.allow.omt-write
+  type: bool
+  value: true
+  mirror: never
+
+#ifdef DEBUG
+  # If set to true, setting a Preference matched to a `Once` StaticPref will
+  # assert that the value matches. Such assertion being broken is a clear flag
+  # that the Once policy shouldn't be used.
+-   name: preferences.check.once.policy
+    type: bool
+    value: false
+    mirror: always
+
+  # If set to true, StaticPrefs Once policy check will be skipped during
+  # automation regression test. Use with care. This pref must be set back to
+  # false as soon as specific test has completed.
+-   name: preferences.force-disable.check.once.policy
+    type: bool
+    value: false
+    mirror: always
+#endif
+
+#---------------------------------------------------------------------------
+# Prefs starting with "print."
+#---------------------------------------------------------------------------
+
+# Variation fonts can't always be embedded in certain output formats
+# such as PDF. To work around this, draw the variation fonts using
+# paths instead of using font embedding.
+- name: print.font-variations-as-paths
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we always print silently (without a print dialog).
+- name: print.always_print_silent
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether we attempt to generate links in Save As PDF output.
+- name: print.save_as_pdf.links.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we attempt to generate and use document-internal PDF destinations.
+- name: print.save_as_pdf.internal_destinations.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we use the CSS @page size as the paper size in PDF output.
+- name: print.save_as_pdf.use_page_rule_size_as_paper_size.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+# The default DPI for printing.
+#
+# For PDF-based output, DPI should ideally be irrelevant, but in fact it is not
+# for multiple reasons:
+#
+#  * Layout code that tries to respect device pixels (e.g. for snapping glyph
+#    positions and baselines, and especially for the "GDI Classic"
+#    rendering-mode threshold for certain fonts).
+#
+#  * The limitations of the PDF format mean that we can't natively represent
+#    certain effects, such as filters, in PDF output, so we need to rasterize
+#    the parts of the document with these applied.
+#
+#  * Other rasterized things like images and such are also affected by DPI
+#    (both in the output, and the images we select via srcset, for example).
+#
+# Therefore, using a high DPI is preferable. For now, we use 144dpi to match
+# physical printer output on Windows, but higher (e.g. 300dpi) might be better,
+# but only if it does not lead to issues such as excessive memory use.
+- name: print.default_dpi
+  type: float
+  value: 144.0f
+  mirror: always
+
+# Whether support for monochrome printing is enabled for CUPS.
+- name: print.cups.monochrome.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Disabling this will no-op window.print()
+- name: print.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Determines if and when to center pages on a sheet horiontally when printing.
+# With a setting of 2, it's guaranteed that A4 on US Letter will be centered.
+#  0: never,
+#  1: always,
+#  2: when the ratio of sheet to page size after content scaling is near 1.0
+- name: print.center_page_on_sheet
+  type: RelaxedAtomicUint32
+  value: 2
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "privacy."
+#---------------------------------------------------------------------------
+
+# Annotate trackers using the strict list. If set to false, the basic list will
+# be used instead.
+- name: privacy.annotate_channels.strict_list.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Annotate trackers using the strict list in the private browsing mode. If set
+# to false, the basic list will be used instead.
+- name: privacy.annotate_channels.strict_list.pbmode.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# First Party Isolation (double keying), disabled by default.
+- name: privacy.firstparty.isolate
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# If false, two windows in the same domain with different first party domains
+# (top level URLs) can access resources through window.opener. This pref is
+# effective only when "privacy.firstparty.isolate" is true.
+- name: privacy.firstparty.isolate.restrict_opener_access
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: privacy.firstparty.isolate.block_post_message
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: privacy.firstparty.isolate.use_site
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Enforce tracking protection in all modes.
+- name: privacy.trackingprotection.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Enforce tracking protection in Private Browsing mode.
+- name: privacy.trackingprotection.pbmode.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Annotate channels based on the tracking protection list in all modes
+- name: privacy.trackingprotection.annotate_channels
+  type: bool
+  value: true
+  mirror: always
+
+# Block 3rd party fingerprinting resources.
+- name: privacy.trackingprotection.fingerprinting.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Block 3rd party cryptomining resources.
+- name: privacy.trackingprotection.cryptomining.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Block 3rd party socialtracking resources.
+- name: privacy.trackingprotection.socialtracking.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Consider socialtracking annotation as trackers (see ETP).
+- name: privacy.socialtracking.block_cookies.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Block 3rd party emailtracking resources in all mode.
+- name: privacy.trackingprotection.emailtracking.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Block 3rd party emailtracking resources in Private Browsing mode.
+- name: privacy.trackingprotection.emailtracking.pbmode.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Collecting 3rd party emailtracking telemetry.
+- name: privacy.trackingprotection.emailtracking.data_collection.enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: privacy.trackingprotection.testing.report_blocked_node
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether to spoof user locale to English (used as part of Resist
+# Fingerprinting).
+# 0 - will prompt
+# 1 - don't spoof
+# 2 - spoof
+- name: privacy.spoof_english
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Send "do not track" HTTP header, disabled by default.
+- name: privacy.donottrackheader.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Potentially send "global privacy control" HTTP header and set navigator
+# property accordingly. Communicates user's desire to opt-out/in of
+# websites or services selling or sharing the user's information, false by
+# default.
+# true - Send the header with a value of 1 to indicate opting-out
+# false - Do not send header to indicate opting-in
+- name: privacy.globalprivacycontrol.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Controls whether or not GPC signals are sent in private browsing mode.
+# This can be overridden by `privacy.globalprivacycontrol.enabled` as true.
+- name: privacy.globalprivacycontrol.pbmode.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Controls whether or not GPC signals are sent. Meant to act as a third option
+# of 'undecided' by leaving the navigator property undefined and not attaching
+# the Sec-GPC HTTP header.
+- name: privacy.globalprivacycontrol.functionality.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Lower the priority of network loads for resources on the tracking protection
+# list.  Note that this requires the
+# privacy.trackingprotection.annotate_channels pref to be on in order to have
+# any effect.
+- name: privacy.trackingprotection.lower_network_priority
+  type: bool
+  value: false
+  mirror: always
+
+# A subset of Resist Fingerprinting protections focused specifically on timers.
+# This affects the Animation API, the performance APIs, Date.getTime,
+# Event.timestamp, File.lastModified, audioContext.currentTime,
+# canvas.captureStream.currentTime.
+- name: privacy.reduceTimerPrecision
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If privacy.reduceTimerPrecision is false, this pref controls whether or not
+# to clamp all timers at a fixed 20 microsconds. It should always be enabled,
+# and is only specified as a pref to enable an emergency disabling in the event
+# of catastrophic failure.
+- name: privacy.reduceTimerPrecision.unconditional
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The resistFingerprinting variables are marked with 'Relaxed' memory ordering.
+# We don't particurally care that threads have a percently consistent view of
+# the values of these prefs. They are not expected to change often, and having
+# an outdated view is not particurally harmful. They will eventually become
+# consistent.
+#
+# The variables will, however, be read often (specifically .microseconds on
+# each timer rounding) so performance is important.
+- name: privacy.resistFingerprinting
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  do_not_use_directly: true
+
+# When the .pbmode pref is on, RFP or FPP will be enabled in PBM
+# When the non-pbm pref is on, they will be enabled in PBM and non-PBM
+- name: privacy.resistFingerprinting.pbmode
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  do_not_use_directly: true
+
+# privacy.fingerprintingProtection enables a set of fingerprinting protections
+# designed to minimize breakage while maximizing protection.
+- name: privacy.fingerprintingProtection
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  do_not_use_directly: true
+
+- name: privacy.fingerprintingProtection.pbmode
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  do_not_use_directly: true
+
+# Disables FPP Remote settings bucket. Allows user to stop overriding
+# of FPP overrides
+- name: privacy.fingerprintingProtection.remoteOverrides.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# This pref can be used to disable mozAddonManager entirely for fingerprinting
+# reasons. Someone like Tor browser will use this pref.
+# NOTE: We'd like this to be a "hidden" pref once StaticPrefs supports it.
+- name: privacy.resistFingerprinting.block_mozAddonManager
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# The log level for browser console messages logged in RFPHelper.sys.mjs. Change to
+# 'All' and restart to see the messages.
+- name: privacy.resistFingerprinting.jsmloglevel
+  type: String
+  value: "Warn"
+  mirror: never
+
+# Enable jittering the clock one precision value forward.
+- name: privacy.resistFingerprinting.reduceTimerPrecision.jitter
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Dynamically tune the resolution of the timer reduction for
+# `privacy.reduceTimerPrecision` and `privacy.resistFingerprinting`.
+- name: privacy.resistFingerprinting.reduceTimerPrecision.microseconds
+  type: RelaxedAtomicUint32
+  value: 1000
+  mirror: always
+
+- name: privacy.resistFingerprinting.target_video_res
+  type: uint32_t
+  value: 1080
+  mirror: always
+
+# Enable resetting the fingerprinting randomization key daily for normal windwos.
+- name: privacy.resistFingerprinting.randomization.daily_reset.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Enable resetting the fingerprinting randomization key daily for private windwos.
+- name: privacy.resistFingerprinting.randomization.daily_reset.private.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Control whether we use the SipHash to generate the canvas random key.
+- name:  privacy.resistFingerprinting.randomization.canvas.use_siphash
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Anti-tracking permission expiration.
+- name: privacy.restrict3rdpartystorage.expiration
+  type: uint32_t
+  value: 2592000   # 30 days (in seconds)
+  mirror: always
+
+# Report Anti-tracking warnings to console lazily
+- name: privacy.restrict3rdpartystorage.console.lazy
+  type: bool
+  value: true
+  mirror: always
+
+# Enable the heuristic to allow storage access for windows opened using window.open() after user interaction
+- name: privacy.restrict3rdpartystorage.heuristic.opened_window_after_interaction
+  type: bool
+  value: true
+  mirror: always
+
+# Enable the heuristic to allow storage access for windows opened using window.open()
+- name: privacy.restrict3rdpartystorage.heuristic.window_open
+  type: bool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
+# Enable the heuristic to allow storage access for windows opened using window.open()
+- name: privacy.restrict3rdpartystorage.heuristic.redirect
+  type: bool
+  value: false
+  mirror: always
+
+# Enable the heuristic to allow storage access for extended navigations with interaction
+- name: privacy.restrict3rdpartystorage.heuristic.navigation
+  type: bool
+#if defined(ANDROID)
+  value: false
+#else
+  value: @IS_NIGHTLY_BUILD@
+#endif
+  mirror: always
+
+# Anti-tracking permission expiration.
+- name: privacy.restrict3rdpartystorage.expiration_redirect
+  type: uint32_t
+  value: 2592000   # 30 days (in seconds)
+  mirror: always
+
+# Anti-tracking user-interaction expiration.
+- name: privacy.userInteraction.expiration
+  type: uint32_t
+  value: 3888000   # 45 days (in seconds)
+  mirror: always
+
+# Anti-tracking user-interaction document interval.
+- name: privacy.userInteraction.document.interval
+  type: uint32_t
+  value: 1800   # 30 minutes (in seconds)
+  mirror: always
+
+# Enable Anti-tracking testing. When it enables, it will notify the observers
+# when user-interaction permission or storage access permission is added. This
+# is for testing only.
+- name: privacy.antitracking.testing
+  type: bool
+  value: false
+  mirror: always
+
+# Controls the anti-tracking webcompat features. This includes:
+# - All URL-Classifier and state partitioning skip lists (prefs and remote
+#   settings)
+# - Storage access heuristics (opener, redirect, etc.)
+# - StorageAccessAPI automatic grants (skips the prompt)
+# - Allowing specific tracking channels on user opt-in (e.g. facebook login
+#   shim).
+- name: privacy.antitracking.enableWebcompat
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enable the heuristic to allow storage access for recent visited pages
+- name: privacy.restrict3rdpartystorage.heuristic.recently_visited
+  type: bool
+#if defined(ANDROID)
+  value: true
+#else
+  value: @IS_NOT_NIGHTLY_BUILD@
+#endif
+  mirror: always
+
+# Valid time gap since last visit
+- name: privacy.restrict3rdpartystorage.heuristic.recently_visited_time
+  type: uint32_t
+  value: 600    # 10 minutes
+  mirror: always
+
+# Recent visited pages redirection permission expiration.
+- name: privacy.restrict3rdpartystorage.expiration_visited
+  type: uint32_t
+  value: 2592000   # 30 days (in seconds)
+  mirror: always
+
+- name: privacy.window.maxInnerWidth
+  type: int32_t
+  value: 1400
+  mirror: always
+
+- name: privacy.window.maxInnerHeight
+  type: int32_t
+  value: 900
+  mirror: always
+
+- name: privacy.sanitize.useOldClearHistoryDialog
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: privacy.sanitize.sanitizeOnShutdown
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: privacy.clearOnShutdown.cache
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: privacy.clearOnShutdown_v2.cache
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: privacy.dynamic_firstparty.limitForeign
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: privacy.dynamic_firstparty.use_site
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: privacy.partition.network_state
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Partition the OCSP cache by the partitionKey.
+- name: privacy.partition.network_state.ocsp_cache
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Partition the OCSP cache by the partitionKey for private browsing mode.
+- name: privacy.partition.network_state.ocsp_cache.pbmode
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Always partition web storage APIs except cookies.
+- name: privacy.partition.always_partition_third_party_non_cookie_storage
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Exclude session storage from the above preference.
+- name: privacy.partition.always_partition_third_party_non_cookie_storage.exempt_sessionstorage
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: privacy.partition.bloburl_per_partition_key
+  type: bool
+  value: true
+  mirror: always
+
+- name: privacy.window.name.update.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# By default, the network state isolation is not active when there is a proxy
+# setting. This pref forces the network isolation even in these scenarios.
+- name: privacy.partition.network_state.connection_with_proxy
+  type: bool
+  value: false
+  mirror: always
+
+# Partition the service workers unconditionally when dFPI is enabled.
+- name: privacy.partition.serviceWorkers
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enables / disables the strip on share feature which strips query parameters
+# when copying/sharing in-content links or from the url bar.
+- name: privacy.query_stripping.strip_on_share.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Enables / disables the URL query string stripping in normal browsing mode
+# which strips query parameters from loading URIs to prevent bounce (redirect)
+# tracking.
+- name: privacy.query_stripping.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Same as the pref above, but controls query stripping for private browsing
+# mode.
+- name: privacy.query_stripping.enabled.pbmode
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# The list which contains query parameters that are needed to be stripped from
+# URIs. The query parameters are separated by a space.
+- name: privacy.query_stripping.strip_list
+  type: String
+  value: ""
+  mirror: never
+
+# This controls if we will do the query string stripping for redirects.
+- name: privacy.query_stripping.redirect
+  type: bool
+  value: true
+  mirror: always
+
+# the list which contains sites where should exempt from query stripping
+- name: privacy.query_stripping.allow_list
+  type: String
+  value: ""
+  mirror: never
+
+# Controls Bounce Tracking Protection behavior.
+# Set to 0 to fully disable. See nsIBounceTrackingProtection.idl for
+# documentation.
+- name: privacy.bounceTrackingProtection.mode
+  type: uint32_t
+#ifdef NIGHTLY_BUILD
+  value: 1
+#else
+  value: 3
+#endif
+  mirror: always
+
+# How long to wait for a client redirect after a navigation ends.
+- name: privacy.bounceTrackingProtection.clientBounceDetectionTimerPeriodMS
+  type: uint32_t
+  value: 10000
+  mirror: always
+
+# How long user activations will protect a site host from storage deletion.
+- name: privacy.bounceTrackingProtection.bounceTrackingActivationLifetimeSec
+  type: uint32_t
+  value: 3888000
+  mirror: always
+
+# How long to wait for interaction after a possible bounce tracking event before
+# deleting a site host's storage.
+- name: privacy.bounceTrackingProtection.bounceTrackingGracePeriodSec
+  type: uint32_t
+  value: 3600
+  mirror: always
+
+# How often to run the bounce tracking timer algorithm  which purges bounce
+# tracker state periodically. Set to 0 to disable purging.
+- name: privacy.bounceTrackingProtection.bounceTrackingPurgeTimerPeriodSec
+  type: uint32_t
+  value: 3600
+  mirror: always
+
+# Whether only bounces that access storage should be considered trackers.
+- name: privacy.bounceTrackingProtection.requireStatefulBounces
+  type: bool
+  value: true
+  mirror: always
+
+# To be used in automated test environments to enable observer messages.
+- name: privacy.bounceTrackingProtection.enableTestMode
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the migration ran to import user activation flags into the BTP user
+# activation store. Set to false to trigger a new migration.
+- name: privacy.bounceTrackingProtection.hasMigratedUserActivationData
+  type: bool
+  value: false
+  mirror: always
+
+# To be used in automated test environments to enable event telemetry
+# collection.
+- name: privacy.imageInputTelemetry.enableTestMode
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "prompts."
+#---------------------------------------------------------------------------
+
+# Prompt modal type prefs
+# See nsIPromptService::MODAL_TYPE fields for possible values.
+
+# Insecure form submit warning.
+- name: prompts.modalType.insecureFormSubmit
+  type: int32_t
+  value: 2
+  mirror: always
+
+# nsHttpChannelAuthProvider#ConfirmAuth anti-phishing prompts.
+- name: prompts.modalType.confirmAuth
+  type: int32_t
+  value: 2
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "security."
+#---------------------------------------------------------------------------
+
+# Mochitests that need to load resource:// URIs not declared content-accessible
+# in manifests should set this pref.
+- name: security.all_resource_uri_content_accessible
+  type: bool
+  value: false
+  mirror: always
+
+- name: security.bad_cert_domain_error.url_fix_enabled
+  type: bool
+  value: true
+  mirror: always
+
+- name: security.csp.reporting.script-sample.max-length
+  type: int32_t
+  value: 40
+  mirror: always
+
+- name: security.csp.truncate_blocked_uri_for_frame_navigations
+  type: bool
+  value: true
+  mirror: always
+
+# Limit the number of CSP reports that are send in a specific timespan.
+- name: security.csp.reporting.limit.count
+  type: uint32_t
+  value: 100
+  mirror: always
+
+# Time span in seconds for reporting limit.
+- name: security.csp.reporting.limit.timespan
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# If true, all toplevel data: URI navigations will be blocked.
+# Please note that manually entering a data: URI in the
+# URL-Bar will not be blocked when flipping this pref.
+- name: security.data_uri.block_toplevel_data_uri_navigations
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to apply the <meta http="Content-Security-Policy"> to browser.xhtml
+- name: security.browser_xhtml_csp.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Allowed by default so it doesn't affect Thunderbird/SeaMonkey, but
+# not allowed for Firefox Desktop in firefox.js
+- name: security.allow_parent_unrestricted_js_loads
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Allowed by default so it doesn't affect Thunderbird/SeaMonkey, but
+# not allowed for Firefox Desktop in firefox.js
+- name: security.allow_eval_with_system_principal
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Allowed by default so it doesn't affect Thunderbird/SeaMonkey, but
+# not allowed for Firefox Desktop in firefox.js
+- name: security.allow_eval_in_parent_process
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Disallowed by default, ensure not disallowed content is loaded in the parent
+# process.
+- name: security.allow_unsafe_parent_loads
+  type: bool
+  value: false
+  mirror: always
+
+# Pref to block mixed scripts (fonts, plugin content, scripts, stylesheets,
+# iframes, websockets, XHR).
+- name: security.mixed_content.block_active_content
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# Pref to block sub requests that happen within an object.
+- name: security.mixed_content.block_object_subrequest
+  type: bool
+  value: false
+  mirror: always
+
+# Pref for mixed display content blocking (images, audio, video).
+- name: security.mixed_content.block_display_content
+  type: bool
+  value: false
+  mirror: always
+
+# Prerequisite pref for mixed display content upgrading (images, audio, video).
+- name: security.mixed_content.upgrade_display_content
+  type: bool
+  value: true
+  mirror: always
+
+# Upgrade images when the upgrading is enabled.
+- name: security.mixed_content.upgrade_display_content.image
+  type: bool
+  value: true
+  mirror: always
+
+# Upgrade audio when the upgrading is enabled.
+- name: security.mixed_content.upgrade_display_content.audio
+  type: bool
+  value: true
+  mirror: always
+
+# Upgrade videos when the upgrading is enabled.
+- name: security.mixed_content.upgrade_display_content.video
+  type: bool
+  value: true
+  mirror: always
+
+# Whether strict file origin policy is in effect. "False" is traditional.
+- name: security.fileuri.strict_origin_policy
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The level to which we sandbox the content process. firefox.js sets the
+# default to different values on a per-OS basis, and has documentation
+# on what the defaults are and what the numbers mean.
+- name: security.sandbox.content.level
+  type: int32_t
+  value: 0
+  mirror: always
+  do_not_use_directly: true # Consumers should use SandboxSettings to ask.
+
+- name: security.sandbox.socket.process.level
+  type: int32_t
+  value: 0
+  mirror: always
+  do_not_use_directly: true # Consumers should use SandboxSettings to ask.
+
+# This controls the strength of the Windows GPU process sandbox.  Changes
+# will require restart.
+# For information on what the level number means, see
+# SetSecurityLevelForGPUProcess() in
+# security/sandbox/win/src/sandboxbroker/sandboxBroker.cpp
+- name: security.sandbox.gpu.level
+  type: int32_t
+#if defined(XP_WIN)
+  value: 1
+#else
+  value: 0
+#endif
+  mirror: always
+
+# Enrollment preferences for the win32k experiment, set and managed by Normandy
+- name: security.sandbox.content.win32k-experiment.enrollmentStatus
+  type: uint32_t
+  value: 0
+  mirror: never
+
+- name: security.sandbox.content.win32k-experiment.startupEnrollmentStatus
+  type: uint32_t
+  value: 0
+  mirror: never
+
+#if defined(XP_WIN) && defined(MOZ_SANDBOX)
+
+  # Whether win32k is disabled for content processes.
+  # true means win32k system calls are not permitted.
+-   name: security.sandbox.content.win32k-disable
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+  # Note: win32k is currently _not_ disabled for GMP due to intermittent test
+  # failures, where the GMP process fails very early. See bug 1449348.
+-   name: security.sandbox.gmp.win32k-disable
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+  # Whether win32k is disabled for socket processes.
+  # true means win32k system calls are not permitted.
+-   name: security.sandbox.socket.win32k-disable
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+  # Whether CET User Shadow Stack compatible modules only is enabled for the
+  # relevant process type.
+-   name: security.sandbox.content.shadow-stack.enabled
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
+-   name: security.sandbox.rdd.shadow-stack.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: security.sandbox.socket.shadow-stack.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: security.sandbox.gpu.shadow-stack.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+-   name: security.sandbox.gmp.shadow-stack.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+  # Whether a Low Privilege AppContainer (LPAC) is enabled for the relevant
+  # process type.
+
+#if defined(MOZ_WMF_MEDIA_ENGINE)
+-   name: security.sandbox.utility-wmf-cdm.lpac.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#endif
+
+  # Whether Arbitrary Code Guard is enabled for the RDD process.
+-   name: security.sandbox.rdd.acg.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+
+#ifdef MOZ_WMF
+  # Whether Arbitrary Code Guard is enabled for the utility WMF audio decoder
+  # process.
+
+-   name: security.sandbox.utility-wmf.acg.enabled
+    type: RelaxedAtomicBool
+    value: true
+    mirror: always
+#endif  // MOZ_WMF
+
+  # Whether CIG is applied pre-spawn or later when lowering the sandbox. We
+  # enable pre-spawn CIG only in Nightly for now because it caused a compat
+  # issue (bug 1682304 and 1704373).
+-   name: security.sandbox.cig.prespawn.enabled
+    type: RelaxedAtomicBool
+    value: @IS_NIGHTLY_BUILD@
+    mirror: always
+
+  # This controls the depth of stack trace that is logged when Windows sandbox
+  # logging is turned on. This is only currently available for the content
+  # process because the only other sandbox (for GMP) has too strict a policy to
+  # allow stack tracing. This does not require a restart to take effect.
+-   name: security.sandbox.windows.log.stackTraceDepth
+    type: RelaxedAtomicUint32
+    value: 0
+    mirror: always
+#endif
+
+#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
+  # Run content processes in headless mode and disallow
+  # connections to the X server.  Requires:
+  # * `webgl.out-of-process` (or else WebGL breaks)
+  # Changing it requires a restart because sandbox policy information
+  # dependent on it is cached.  See bug 1640345 for details.
+- name: security.sandbox.content.headless
+  type: bool
+  value: true
+  mirror: once
+#endif
+
+#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
+- name: security.sandbox.warn_unprivileged_namespaces
+  type: bool
+  value: true
+  mirror: always
+#endif
+
+# Pref to show warning when submitting from secure to insecure.
+- name: security.warn_submit_secure_to_insecure
+  type: bool
+  value: true
+  mirror: always
+
+# Hardware Origin-bound Second Factor Support
+- name: security.webauth.webauthn
+  type: bool
+  value: true
+  mirror: always
+
+# WebAuthn CTAP2 support
+- name: security.webauthn.ctap2
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# WebAuthn JSON serialization methods
+- name: security.webauthn.enable_json_serialization_methods
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# WebAuthn conditional mediation
+- name: security.webauthn.enable_conditional_mediation
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Dispatch WebAuthn requests to virtual authenticators (mutually exclusive
+# with and webauthn_enable_usbtoken)
+- name: security.webauth.webauthn_enable_softtoken
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# residentKey support when using Android platform API
+- name: security.webauthn.webauthn_enable_android_fido2.residentkey
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Dispatch WebAuthn requests to the macOS platform API
+- name: security.webauthn.enable_macos_passkeys
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Dispatch WebAuthn requests to authenticator-rs
+- name: security.webauth.webauthn_enable_usbtoken
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+  rust: true
+
+# Skip direct attestation consent prompts (for tests).
+- name: security.webauth.webauthn_testing_allow_direct_attestation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+# Show the Windows Passkey settings link in about:preferences. This is
+# set to true if we find that webauthn.dll is sufficiently recent.
+- name: security.webauthn.show_ms_settings_link
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Block Worker/SharedWorker scripts with wrong MIME type.
+- name: security.block_Worker_with_wrong_mime
+  type: bool
+  value: true
+  mirror: always
+
+# Block the execution of scripts using a wrong type as defined by the file extension
+# (OS) mapping when loaded via the file:// protocol.
+- name: security.block_fileuri_script_with_wrong_mime
+  type: bool
+  value: false
+  mirror: always
+
+# Cancel outgoing requests from SystemPrincipal:
+# but only with scheme http(s) and contentpolicytype subdocument
+- name: security.disallow_privileged_https_subdocuments_loads
+  type: bool
+  value: true
+  mirror: always
+
+# but only with scheme data and contentpolicytype subdocument
+- name: security.disallow_privileged_data_subdocuments_loads
+  type: bool
+  value: true
+  mirror: always
+
+# Cancel outgoing requests from SystemPrincipal:
+# but only with scheme http(s) and contentpolicytype stylesheet
+- name: security.disallow_privileged_https_stylesheet_loads
+  type: bool
+  value: true
+  mirror: always
+
+# Cancel outgoing requests from SystemPrincipal:
+# but only with scheme http(s) and contentpolicytype script
+- name: security.disallow_privileged_https_script_loads
+  type: bool
+  value: true
+  mirror: always
+
+# Cancel outgoing requests from SystemPrincipal:
+# where there is no finalURI.
+- name: security.disallow_privileged_no_finaluri_loads
+  type: bool
+  value: true
+  mirror: always
+
+# Cancel outgoing requests from privileged about pages:
+# but only with scheme http(s) and contentpolicytype script
+- name: security.disallow_privilegedabout_remote_script_loads
+  type: bool
+  value: true
+  mirror: always
+
+# Enable preloaded static key pins by default.
+- name: security.cert_pinning.enforcement_level
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+  do_not_use_directly: true
+
+# OCSP fetching behavior:
+# 0: do not fetch OCSP
+# 1: fetch OCSP for DV and EV certificates
+# 2: fetch OCSP only for EV certificates
+- name: security.OCSP.enabled
+  type: RelaxedAtomicUint32
+#ifdef ANDROID
+  value: 2
+#else
+  value: 1
+#endif
+  mirror: always
+
+
+# Whether or not OCSP is required.
+# true => hard-fail (if an OCSP request times out, stop the connection)
+# false => soft-fail (if an OCSP request times out, continue the connection)
+- name: security.OCSP.require
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# How many milliseconds to wait for an OCSP response before assuming it failed
+# (when fetching for soft-fail).
+- name: security.OCSP.timeoutMilliseconds.soft
+  type: RelaxedAtomicUint32
+#ifdef RELEASE_OR_BETA
+  value: 2000
+#else
+  value: 1000
+#endif
+  mirror: always
+
+# How many milliseconds to wait for an OCSP response before assuming it failed
+# (when fetching for hard-fail).
+- name: security.OCSP.timeoutMilliseconds.hard
+  type: RelaxedAtomicUint32
+  value: 10000
+  mirror: always
+
+# Whether or not to enable OCSP must-staple (in other words, TLS-feature with
+# status request).
+- name: security.ssl.enable_ocsp_must_staple
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether or not to enable OCSP stapling.
+- name: security.ssl.enable_ocsp_stapling
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# This is checked at startup to see if NSS should be initialized without the
+# user's certificate and key databases.
+- name: security.nocertdb
+  type: bool
+  value: false
+  mirror: once
+
+# Whether or not to import and trust third party root certificates from the OS.
+- name: security.enterprise_roots.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true, attempt to load the osclientcerts PKCS#11 module at startup on a
+# background thread. This module allows Firefox to use client certificates
+# stored in OS certificate storage. Currently only available for Windows and
+# macOS.
+- name: security.osclientcerts.autoload
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# If true, assume tokens accessed via osclientcerts implement RSA-PSS. If a
+# given token does not support RSA-PSS, users may see the error
+# 'SEC_ERROR_PKCS11_GENERAL_ERROR' if a server indicates it will accept an
+# RSA-PSS signature in the client's certificate verify message.
+# Setting this to false may allow such connections to succeed, if the server
+# also accepts RSA-PKCS1 signatures.
+- name: security.osclientcerts.assume_rsa_pss_support
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+- name: security.pki.cert_short_lifetime_in_days
+  type: RelaxedAtomicUint32
+  value: 10
+  mirror: always
+
+# security.pki.netscape_step_up_policy controls how the platform handles the
+# id-Netscape-stepUp OID in extended key usage extensions of CA certificates.
+# 0: id-Netscape-stepUp is always considered equivalent to id-kp-serverAuth
+# 1: it is considered equivalent when the notBefore is before 23 August 2016
+# 2: similarly, but for 23 August 2015
+# 3: it is never considered equivalent
+- name: security.pki.netscape_step_up_policy
+  type: RelaxedAtomicUint32
+#ifdef RELEASE_OR_BETA
+  value: 1
+#else
+  value: 2
+#endif
+  mirror: always
+
+# Configures Certificate Transparency support mode:
+# 0: Fully disabled.
+# 1: Only collect telemetry. CT qualification checks are not performed.
+# 2: Enforce CT.
+- name: security.pki.certificate_transparency.mode
+  type: RelaxedAtomicUint32
+#ifdef EARLY_BETA_OR_EARLIER
+  value: 2
+#else
+  value: 0
+#endif
+  mirror: always
+
+# A comma-separated list of host names to not enforce certificate transparency
+# for. Entries of the form 'example.com' apply to the host 'example.com' and
+# all subdomains (e.g. 'sub.example.com', 'sub.www.example.com', etc.).
+# Entries of the form '.example.com' only apply to the host 'example.com'.
+# Entries may also be IP addresses.
+- name: security.pki.certificate_transparency.disable_for_hosts
+  type: String
+  value: ""
+  mirror: never
+
+# A comma-separated list of base64-encoded sha256 hashes of subject public key
+# infos to not enforce certificate transparency for. If a verified certificate
+# chain contains a certificate with a SPKI hash in this list, certificate
+# transparency will not be enforced for that connection.
+- name: security.pki.certificate_transparency.disable_for_spki_hashes
+  type: String
+  value: ""
+  mirror: never
+
+# 0: Disable CRLite entirely.
+# 1: Consult CRLite but only collect telemetry.
+# 2: Consult CRLite and enforce both "Revoked" and "Not Revoked" results.
+# 3: Consult CRLite and enforce "Not Revoked" results, but defer to OCSP for "Revoked".
+- name: security.pki.crlite_mode
+  type: RelaxedAtomicUint32
+#ifdef NIGHTLY_BUILD
+  value: 2
+#else
+  value: 3
+#endif
+  mirror: always
+
+# The CRLite filter channel to which the user is subscribed.
+# - "all" => bloom-filter cascades that contain all revocations. Stash based delta updates.
+# - "experimental" => clubcards that contain all revocations. Stash based delta updates.
+# - "experimental+deltas" => clubcards that contain all revocations. Clubcard based delta updates.
+- name: security.pki.crlite_channel
+  type: String
+#ifdef NIGHTLY_BUILD
+  value: "experimental+deltas"
+#else
+  value: "all"
+#endif
+  mirror: never
+
+# The number of SCTs that must be "covered" by a CRLite filter before
+# we will enforce a result from that filter.
+- name: security.pki.crlite_timestamps_for_coverage
+  type: RelaxedAtomicUint32
+  value: 1
+  mirror: always
+  rust: true
+
+- name: security.pki.use_modern_crypto_with_pkcs12
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# The number of entries in the certificate signature cache.
+# A higher number increases memory usage, but should increase the cache hit rate.
+# Each entry is approximately 64 bytes, and the maximum number of entries is 65535.
+- name: security.pki.cert_signature_cache_size
+  type: RelaxedAtomicUint32
+  value: 128
+  mirror: always
+
+# The number of entries in the SCT signature cache.
+# A higher number increases memory usage, but should increase the cache hit rate.
+# Each entry is approximately 64 bytes, and the maximum number of entries is 65535.
+# There will be 2-3 SCTs per certificate, so this probably needs to be 2-3x
+# security.pki.cert_signature_cache_size to achieve similar hit rates.
+- name: security.pki.sct_signature_cache_size
+  type: RelaxedAtomicUint32
+  value: 256
+  mirror: always
+
+# The number of entries in the certificate trust cache.
+# A higher number increases memory usage, but should increase the cache hit rate.
+# Each entry is approximately 65 bytes, and the maximum number of entries is 65535.
+- name: security.pki.cert_trust_cache_size
+  type: RelaxedAtomicUint32
+  value: 128
+  mirror: always
+
+- name: security.tls.version.min
+  type: RelaxedAtomicUint32
+  value: 3
+  mirror: always
+
+- name: security.tls.version.max
+  type: RelaxedAtomicUint32
+  value: 4
+  mirror: always
+
+- name: security.tls.version.enable-deprecated
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: security.tls.version.fallback-limit
+  type: RelaxedAtomicUint32
+  value: 4
+  mirror: always
+
+# Turn off post-handshake authentication for TLS 1.3 by default,
+# until the incompatibility with HTTP/2 is resolved:
+# https://tools.ietf.org/html/draft-davidben-http2-tls13-00
+- name: security.tls.enable_post_handshake_auth
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Probability of GREASEing a TLS connection with ECH (0-100)
+# 0 means never GREASE, 100 means always GREASE
+- name: security.tls.ech.grease_probability
+  type: RelaxedAtomicUint32
+  value: 100
+  mirror: always
+
+# Whether to apply ECH GREASE settings to HTTP3/QUIC connections
+- name: security.tls.ech.grease_http3
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to retry connections without ECH Grease
+- name: security.tls.ech.disable_grease_on_fallback
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# ECH GREASE Padding target (1-255)
+- name: security.tls.ech.grease_size
+  type: RelaxedAtomicUint32
+  value: 100
+  mirror: always
+
+# Whether to apply GREASE settings to HTTP3/QUIC connections
+- name: security.tls.grease_http3_enable
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+  rust: true
+
+- name: security.tls.hello_downgrade_check
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.tls.enable_delegated_credentials
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.tls.enable_0rtt_data
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.tls.enable_kyber
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+  rust: true
+
+- name: security.tls.client_hello.send_p256_keyshare
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+- name: security.tls.enable_certificate_compression_zlib
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.tls.enable_certificate_compression_brotli
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.tls.enable_certificate_compression_zstd
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl.treat_unsafe_negotiation_as_broken
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: security.ssl.require_safe_negotiation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: security.ssl.enable_false_start
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl.enable_alpn
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl.disable_session_identifiers
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: security.ssl3.ecdhe_rsa_aes_128_gcm_sha256
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.ecdhe_ecdsa_aes_128_gcm_sha256
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.ecdhe_ecdsa_chacha20_poly1305_sha256
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.ecdhe_rsa_chacha20_poly1305_sha256
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.ecdhe_ecdsa_aes_256_gcm_sha384
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.ecdhe_rsa_aes_256_gcm_sha384
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.ecdhe_rsa_aes_128_sha
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.ecdhe_ecdsa_aes_128_sha
+  type: RelaxedAtomicBool
+  value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+- name: security.ssl3.ecdhe_rsa_aes_256_sha
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.ecdhe_ecdsa_aes_256_sha
+  type: RelaxedAtomicBool
+  value: @IS_NOT_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
+- name: security.ssl3.dhe_rsa_aes_128_sha
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: security.ssl3.dhe_rsa_aes_256_sha
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: security.ssl3.rsa_aes_128_sha
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.rsa_aes_256_sha
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.rsa_aes_128_gcm_sha256
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.rsa_aes_256_gcm_sha384
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.ssl3.deprecated.rsa_des_ede3_sha
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.tls13.aes_128_gcm_sha256
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.tls13.chacha20_poly1305_sha256
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: security.tls13.aes_256_gcm_sha384
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "signon."
+#---------------------------------------------------------------------------
+- name: signon.usernameOnlyForm.enabled
+  type: bool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "slider."
+#---------------------------------------------------------------------------
+
+# Scrollbar snapping region.
+# - 0: off
+# - 1 and higher: slider thickness multiple
+- name: slider.snapMultiplier
+  type: int32_t
+#ifdef XP_WIN
+  value: 6
+#else
+  value: 0
+#endif
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "storage."
+#---------------------------------------------------------------------------
+
+# Whether to use a non-exclusive VFS.
+# By default we use the unix-excl VFS, for the following reasons:
+# 1. It improves compatibility with NFS shares, whose implementation
+#    is incompatible with SQLite's locking requirements (reliable fcntl), and
+#    in particular with WAL journaling.
+#    Bug 433129 attempted to automatically identify such file-systems,
+#    but a reliable way was not found and the fallback locking is slower than
+#    POSIX locking, so we do not want to do it by default.
+# 2. It allows wal mode to avoid the memory mapped -shm file, reducing the
+#    likelihood of SIGBUS failures when disk space is exhausted.
+# 3. It provides some protection from third party database tampering while a
+#    connection is open.
+# Note there's no win32-excl VFS, so this has no effect on Windows.
+- name: storage.sqlite.exclusiveLock.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "svg."
+#---------------------------------------------------------------------------
+
+# This pref controls whether the 'context-fill' and 'context-stroke' keywords
+# can be used in SVG-as-an-image in the content processes to use the fill/
+# stroke specified on the element that embeds the image. (These keywords are
+# always enabled in the chrome process, regardless of this pref.) Also, these
+# keywords are currently not part of any spec, which is partly why we disable
+# them for web content.
+- name: svg.context-properties.content.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# This pref controls whether the `prefers-color-scheme` value of SVG images
+# reacts to the embedder `color-scheme` in content.
+- name: svg.embedder-prefers-color-scheme.content.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Enables the 'context-fill' and 'context-stroke' keywords for particular
+# domains. We expect this list to be Mozilla-controlled properties, since the
+# 'context-*' keywords are not part of any spec. We expect to remove this
+# preference and the 'context-` keyword support entirely in the
+# not-too-distant future when a standardized alternative ships. This preference
+# is _not_ for allowing web content to use these keywords. For performance
+# reasons, the list of domains in this preference should remain short in
+# length.
+- name: svg.context-properties.content.allowed-domains
+  type: String
+  value: ""
+  mirror: never
+
+# Is support for the new getBBox method from SVG 2 enabled?
+# See https://svgwg.org/svg2-draft/single-page.html#types-SVGBoundingBoxOptions
+- name: svg.new-getBBox.enabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Whether we use Moz2D Path::GetStrokedBounds to get the stroke bounds.
+- name: svg.Moz2D.strokeBounds.enabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Whether SVGGraphicsElement.nearestViewportElement and SVGGraphicsElement.farthestViewportElement are enabled.
+- name: svg.nearestAndFarthestViewportElement.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether SVGAElement.text is enabled.
+- name: svg.SVGAElement.text.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# This enables discard processing
+- name: svg.discard.enabled
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
+# Tweak which elements are allowed in <svg:use> subtrees, and in which
+# circumstances. See RemoveForbiddenNodes in SVGUseElement.cpp for the spec
+# text.
+#
+# - 0: Don't restrict ever.
+# - 1: Restrict only cross-document.
+# - 2/other: restrict always.
+#
+# We allow the behavior to be configurable via this pref. Our chosen default
+# value forbids non-graphical content in <svg:use> clones of cross-document
+# elements. This is a compromise between our more-permissive pre-existing
+# behavior (which SVG 2 seems to call for, and maps to pref value 0) and the
+# behavior of other UAs (which SVG 1.1 seems to call for, and maps to pref
+# value 2).
+- name: svg.use-element.graphics-element-restrictions
+  type: int32_t
+  value: 1
+  mirror: always
+
+# Whether to restrict <svg:use> element recursion levels.
+#
+# - 0: Don't restrict ever.
+# - 1: Restrict everywhere
+# - 2/other: Restrict only in the parent process.
+#
+- name: svg.use-element.recursive-clone-limit.enabled
+  type: int32_t
+  value: 2
+  mirror: always
+
+# What is the recursion limit for svg use element cloning if enabled.
+- name: svg.use-element.recursive-clone-limit
+  type: uint32_t
+  value: 8
+  mirror: always
+
+# Whether <svg:use> with a data: URL as href is allowed
+- name: svg.use-element.data-url-href.allowed
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "telemetry."
+#---------------------------------------------------------------------------
+
+- name: telemetry.number_of_site_origin.min_interval
+  type: uint32_t
+  value: 300000
+  mirror: always
+
+- name: telemetry.fog.test.localhost_port
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+  rust: true
+
+- name: telemetry.fog.test.activity_limit
+  type: RelaxedAtomicInt32
+  value: 120
+  mirror: always
+  rust: true
+
+- name: telemetry.fog.test.inactivity_limit
+  type: RelaxedAtomicInt32
+  value: 1200
+  mirror: always
+  rust: true
+
+- name: telemetry.fog.artifact_build
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "test."
+#---------------------------------------------------------------------------
+
+- name: test.events.async.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Enable assertions in IMEContentObserver::FlatTextCache on debug builds.
+# If this pref is enabled, DOM mutation becomes much slower.
+- name: test.ime_content_observer.assert_valid_cache
+  type: bool
+  value: false
+  mirror: always
+
+- name: test.mousescroll
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "thread."
+#---------------------------------------------------------------------------
+
+# If the service is available, set threads to low-power mode when in the background.
+- name: threads.use_low_power.enabled
+  type: RelaxedAtomicBool
+#ifdef XP_MACOSX
+  value: true
+#else
+  value: @IS_NIGHTLY_BUILD@
+#endif
+  mirror: always
+
+
+# If the process priority is set to background, put the main thread in the background.
+# Currently off by default.
+- name: threads.lower_mainthread_priority_in_background.enabled
+  type: bool
+#ifdef XP_MACOSX
+  value: true
+#else
+  value: @IS_NIGHTLY_BUILD@
+#endif
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "timer."
+#---------------------------------------------------------------------------
+
+# Since our timestamp on macOS does not increment while the system is asleep, we
+# should ignore sleep/wake notifications to make timer thread process timers.
+- name: timer.ignore_sleep_wake_notifications
+  type: RelaxedAtomicBool
+#ifdef XP_MACOSX
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Amount of time by which it is always acceptable to delay the firing of a timer.
+# Any timer may be delayed by up to this amount in order to enable timers to be
+# bundled together for efficiency.
+- name: timer.minimum_firing_delay_tolerance_ms
+  type: AtomicFloat
+  value: 1.0
+  mirror: always
+
+# Maximum amount of time by which it is ever acceptable to delay the firing of a timer.
+# Setting this to zero will effectively disable timer coalescing.
+- name: timer.maximum_firing_delay_tolerance_ms
+  type: AtomicFloat
+  value: 10000.0
+  mirror: always
+
+#ifdef XP_WIN
+  # Controls whether or not TimerThread will automatically increase the Windows timer
+  # resolution when appropriate conditions are met.
+-   name: timer.auto_increase_timer_resolution
+    type: RelaxedAtomicBool
+#ifdef NIGHTLY_BUILD
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+#endif
+
+#---------------------------------------------------------------------------
+# Prefs starting with "toolkit."
+#---------------------------------------------------------------------------
+
+# Makes removeDirectory background task wait for the given milliseconds before removal.
+- name: toolkit.background_tasks.remove_directory.testing.sleep_ms
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+# Returns true if BHR is disabled.
+- name: toolkit.content-background-hang-monitor.disabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: toolkit.scrollbox.smoothScroll
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: toolkit.scrollbox.horizontalScrollDistance
+  type: RelaxedAtomicInt32
+  value: 5
+  mirror: always
+
+- name: toolkit.scrollbox.verticalScrollDistance
+  type: RelaxedAtomicInt32
+  value: 3
+  mirror: always
+
+# The maximum overlap between pages when scrolling with
+# page-up/page-down/spacebar, as a percentage of scrollport size.
+- name: toolkit.scrollbox.pagescroll.maxOverlapPercent
+  type: RelaxedAtomicInt32
+  value: 10
+  mirror: always
+
+# The maximum overlap between pages when scrolling with
+# page-up/page-down/spacebar, in lines.
+- name: toolkit.scrollbox.pagescroll.maxOverlapLines
+  type: RelaxedAtomicInt32
+  value: 2
+  mirror: always
+
+# The lateWriteChecksStage and fastShutdownStage below represent the stage
+# of shutdown after which we (for lateWriteChecksStage) crash / gather
+# telemetry data on file writes, or (for fastShutdownStage) we call _exit(0).
+# Higher values are earlier during shutdown, and the full enumeration can
+# be found in AppShutdown.h in the AppShutdownPhase enum.
+- name: toolkit.shutdown.lateWriteChecksStage
+  type: int32_t
+#ifdef MOZ_CODE_COVERAGE
+  value: 0
+#else
+  value: 2
+#endif
+  mirror: always
+
+# See the comment above toolkit.shutdown.lateWriteChecksStage. A higher value
+# for this pref means we call _exit(0) earlier during shutdown.
+- name: toolkit.shutdown.fastShutdownStage
+  type: int32_t
+#if !defined(DEBUG) && !defined(MOZ_ASAN) && !defined(MOZ_TSAN) && !defined(MOZ_CODE_COVERAGE) && !defined(MOZ_VALGRIND) && !defined(MOZ_PROFILE_GENERATE) && !defined(JS_STRUCTURED_SPEW)
+  value: 1
+#else
+  value: 0
+#endif
+  mirror: always
+
+# Sending each remote accumulation immediately places undue strain on the IPC
+# subsystem. Batch the remote accumulations for a period of time before sending
+# them all at once. This value was chosen as a balance between data timeliness
+# and performance (see bug 1218576).
+- name: toolkit.telemetry.ipcBatchTimeout
+  type: uint32_t
+  value: 2000
+  mirror: always
+
+- name: toolkit.telemetry.testing.overrideProductsCheck
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "ui."
+#---------------------------------------------------------------------------
+
+- name: ui.key.generalAccessKey
+  type: int32_t
+  value: -1
+  mirror: always
+
+# Use 17 for Ctrl, 18 for Alt, 91 or 224 for Meta, 0 for none.
+- name: ui.key.accelKey
+  type: uint32_t
+#ifdef XP_MACOSX
+  value: 224
+#else
+  value: 17
+#endif
+  mirror: always
+
+# See above for the key codes to use.
+- name: ui.key.menuAccessKey
+  type: uint32_t
+#ifdef XP_MACOSX
+  value: 0
+#else
+  value: 18
+#endif
+  mirror: always
+
+# Only used if generalAccessKey is -1.
+- name: ui.key.chromeAccess
+  type: int32_t
+#ifdef XP_MACOSX
+  # 0 = disabled, 1 = Shift, 2 = Ctrl, 4 = Alt, 3 =  ctrl+shift, 8 = Meta
+  value: 2
+#else
+  # 0 = disabled, 1 = Shift, 2 = Ctrl, 4 = Alt, 5 =  Alt+Shift, 8 = Win
+  value: 4
+#endif
+  mirror: always
+
+# Only used if generalAccessKey is -1.
+- name: ui.key.contentAccess
+  type: int32_t
+#ifdef XP_MACOSX
+  # 0 = disabled, 1 = Shift, 2 = Ctrl, 4 = Alt, 3 = ctrl+shift, 8 = Meta
+  value: 6
+#else
+  # 0 = disabled, 1 = Shift, 2 = Ctrl, 4 = Alt, 5 =  Alt+Shift, 8 = Win
+  value: 5
+#endif
+  mirror: always
+
+#ifdef XP_WIN
+- name: ui.key.layout.load_when_first_needed
+  type: bool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+#endif
+
+# Does the access key by itself focus the menu bar?
+- name: ui.key.menuAccessKeyFocuses
+  type: bool
+#if defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
+  # On Windows and Linux, we now default to showing the menu bar only when alt
+  # is pressed.
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+# Whether native key bindings in the environment or builtin shortcut key
+# definitions in Gecko are used first in <input> and <textarea>
+- name: ui.key.textcontrol.prefer_native_key_bindings_over_builtin_shortcut_key_definitions
+  type: bool
+  value: true
+  mirror: always
+
+#ifdef MOZ_WIDGET_GTK
+# Only GtkTextView (native multiline text viewer/editor) supports "select-all"
+# signal so that we cannot know "select-all" key bindings only with GtkEntry.
+# When this pref is set to true, if a key combination does not cause any
+# signals in GtkEntry, try to check the key combination is mapped to
+# "select-all" in GtkTextView or not.  If it's mapped to other commands, they
+# are just ignored.
+- name: ui.key.use_select_all_in_single_line_editor
+  type: bool
+  value: true
+  mirror: always
+#endif
+
+# Duration of timeout of incremental search in menus (ms).  0 means infinite.
+- name: ui.menu.incremental_search.timeout
+  type: uint32_t
+  value: 1000
+  mirror: always
+
+# If true, popups are attached to their native parent window (and move with it)
+# and can't overlap the OS chrome. Otherwise they are topmost.
+# NOTE(emilio): Comments below might not be accurate anymore.
+- name: ui.panel.default_level_parent
+  type: RelaxedAtomicBool
+#if defined(XP_WIN) || defined(XP_MACOSX)
+  # See bug 448927, on topmost panel, some IMEs are not usable on Windows.
+  # See bug 404131, topmost <panel> element wins to Dashboard on MacOSX.
+  value: true
+#else
+  # Setting default_level_parent to true makes the default level for popup
+  # windows "top" instead of "parent".  On GTK2 platform, this is implemented
+  # with override-redirect windows which is the normal way to implement
+  # temporary popup windows.  Setting this to false would make the default
+  # level "parent" which is implemented with managed windows. A problem with
+  # using managed windows is that metacity sometimes deactivates the parent
+  # window when the managed popup is shown, see bug 526941.
+  #
+  # TODO(emilio): Re-evaluate this default, the comment above is no longer
+  # true since bug 552982 (where we started looking at mNoAutohide rather than
+  # popup level to make the override-redirect vs. managed window distinction).
+  #
+  # The Android default was copied from GTK in bug 568700.
+  value: false
+#endif
+  mirror: always
+
+# If true, all popups won't hide automatically on blur
+- name: ui.popup.disable_autohide
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Negate scroll, true will make the mouse scroll wheel move the screen the
+# same direction as with most desktops or laptops.
+- name: ui.scrolling.negate_wheel_scroll
+  type: RelaxedAtomicBool
+  value: @IS_ANDROID@
+  mirror: always
+
+# Delay in milliseconds for tooltips
+- name: ui.tooltip.delay_ms
+  type: uint32_t
+  value: 500
+  mirror: always
+
+# If the user puts a finger down on an element and we think the user might be
+# executing a pan gesture, how long do we wait before tentatively deciding the
+# gesture is actually a tap and activating the target element?
+- name: ui.touch_activation.delay_ms
+  type: int32_t
+  value: 100
+  mirror: always
+
+# If the user has clicked an element, how long do we keep the :active state
+# before it is cleared.
+- name: ui.touch_activation.duration_ms
+  type: int32_t
+  value: 50
+  mirror: always
+
+# Prevent system colors from being exposed to CSS or canvas.
+- name: ui.use_standins_for_native_colors
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether context menus should only appear on mouseup instead of mousedown,
+# on OSes where they normally appear on mousedown (macOS, *nix).
+# Note: ignored on Windows (context menus always use mouseup).
+- name: ui.context_menus.after_mouseup
+  type: bool
+  value: false
+  mirror: always
+
+# Whether click-hold context menus are enabled.
+- name: ui.click_hold_context_menus
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# How long to wait for a drag gesture before displaying click-hold context menu,
+# in milliseconds.
+- name: ui.click_hold_context_menus.delay
+  type: RelaxedAtomicInt32
+  value: 500
+  mirror: always
+
+# When enabled, the touch.radius and mouse.radius prefs allow events to be
+# dispatched to nearby elements that are sensitive to the event. See
+# PositionedEventTargeting.cpp. The 'mm' prefs define a rectangle around the
+# nominal event target point within which we will search for suitable elements.
+# 'visitedWeight' is a percentage weight; a value > 100 makes a visited link be
+# treated as further away from the event target than it really is, while a
+# value < 100 makes a visited link be treated as closer to the event target
+# than it really is.
+
+- name: ui.touch.radius.enabled
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+- name: ui.touch.radius.topmm
+  type: uint32_t
+#ifdef ANDROID
+  value: 2
+#else
+  value: 12
+#endif
+  mirror: always
+
+- name: ui.touch.radius.rightmm
+  type: uint32_t
+#ifdef ANDROID
+  value: 3
+#else
+  value: 8
+#endif
+  mirror: always
+
+- name: ui.touch.radius.bottommm
+  type: uint32_t
+#ifdef ANDROID
+  value: 2
+#else
+  value: 4
+#endif
+  mirror: always
+
+- name: ui.touch.radius.leftmm
+  type: uint32_t
+#ifdef ANDROID
+  value: 3
+#else
+  value: 8
+#endif
+  mirror: always
+
+- name: ui.touch.radius.visitedWeight
+  type: uint32_t
+  value: 120
+  mirror: always
+
+- name: ui.mouse.radius.enabled
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+- name: ui.mouse.radius.topmm
+  type: uint32_t
+#ifdef ANDROID
+  value: 2
+#else
+  value: 12
+#endif
+  mirror: always
+
+- name: ui.mouse.radius.rightmm
+  type: uint32_t
+#ifdef ANDROID
+  value: 3
+#else
+  value: 8
+#endif
+  mirror: always
+
+- name: ui.mouse.radius.bottommm
+  type: uint32_t
+#ifdef ANDROID
+  value: 2
+#else
+  value: 4
+#endif
+  mirror: always
+
+- name: ui.mouse.radius.leftmm
+  type: uint32_t
+#ifdef ANDROID
+  value: 3
+#else
+  value: 8
+#endif
+  mirror: always
+
+- name: ui.mouse.radius.visitedWeight
+  type: uint32_t
+  value: 120
+  mirror: always
+
+- name: ui.mouse.radius.reposition
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+# When true, the ui.mouse.radius.* prefs will only affect simulated mouse
+# events generated by touch input. When false, the prefs will be used for all
+# mouse events.
+- name: ui.mouse.radius.inputSource.touchOnly
+  type: bool
+  value: true
+  mirror: always
+
+# When true, selection is not collapsed at the right click point if there is a
+# non-collapsed selection.
+- name: ui.mouse.right_click.collapse_selection.stop_if_non_collapsed_selection
+  type: bool
+  value: true
+  mirror: always
+
+# When true, selection is not collapsed at the right click point if the clicked
+# node is not editable.
+- name: ui.mouse.right_click.collapse_selection.stop_if_non_editable_node
+  type: bool
+  value: false
+  mirror: always
+
+# When true, the caret is not moved to the right click point in focused editable
+# content.
+- name: ui.mouse.right_click.move_caret.stop_if_in_focused_editable_node
+  type: bool
+  value: false
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "urlclassifier."
+#---------------------------------------------------------------------------
+
+# Update server response timeout for Safe Browsing.
+- name: urlclassifier.update.response_timeout_ms
+  type: uint32_t
+  value: 30000
+  mirror: always
+
+# Download update timeout for Safe Browsing.
+- name: urlclassifier.update.timeout_ms
+  type: uint32_t
+  value: 90000
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "view_source."
+#---------------------------------------------------------------------------
+
+- name: view_source.editor.external
+  type: bool
+  value: false
+  mirror: always
+
+- name: view_source.wrap_long_lines
+  type: bool
+  value: @IS_ANDROID@
+  mirror: always
+
+- name: view_source.syntax_highlight
+  type: bool
+  value: true
+  mirror: always
+
+- name: view_source.tab_size
+  type: int32_t
+  value: 4
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "webgl." (for pref access from Worker threads)
+#---------------------------------------------------------------------------
+
+- name: webgl.1.allow-core-profiles
+  type: RelaxedAtomicBool
+#ifdef XP_MACOSX
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: webgl.1.request_es2
+  type: RelaxedAtomicBool
+#ifdef XP_WIN
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+- name: webgl.angle.force-d3d11
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.angle.try-d3d11
+  type: RelaxedAtomicBool
+#ifdef XP_WIN
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: webgl.angle.force-warp
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.auto-flush
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.auto-flush.gl
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.can-lose-context-in-foreground
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.cgl.multithreaded
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.drawing_buffer_color_space
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.debug.incomplete-tex-color
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
+- name: webgl.default-antialias
+  type: RelaxedAtomicBool
+  value: @IS_NOT_ANDROID@
+  mirror: always
+
+- name: webgl.default-no-alpha
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.disable-angle
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.disable-wgl
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.dxgl.enabled
+  type: RelaxedAtomicBool
+#ifdef XP_WIN
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: webgl.dxgl.needs-finish
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.disable-fail-if-major-performance-caveat
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.disable-DOM-blit-uploads
+  type: RelaxedAtomicBool
+#if defined(MOZ_AARCH64) && defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+- name: webgl.disabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.enable-debug-renderer-info
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.enable-draft-extensions
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.enable-privileged-extensions
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.enable-renderer-query
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.enable-egl-image
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.enable-surface-texture
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.enable-webgl2
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.fake-verts.max
+  type: RelaxedAtomicUint32
+  value: 10*1000*1000  # 10M as vec4 is count*4*4 = 160MB
+  mirror: always
+
+# Only works on Mac for now.
+- name: webgl.forbid-hardware
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Only works on Mac for now.
+- name: webgl.forbid-software
+  type: RelaxedAtomicBool
+  value: true  # It's generally better to encourage fallback to e.g. canvas2d.
+  mirror: always
+
+- name: webgl.force-enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.force-index-validation
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: webgl.gl_khr_no_error
+  type: RelaxedAtomicBool
+#ifdef XP_WIN
+  value: false
+#elif defined(MOZ_WIDGET_GTK)
+  # Bug 1862039 - All versions of Mesa as of Nov 2023 have issues with
+  # GL_CONTEXT_FLAG_NO_ERROR_BIT. We should aspire to reenable it at
+  # some point when the bugs are fixed.
+  # See also https://gitlab.freedesktop.org/mesa/mesa/-/issues/10062
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+- name: webgl.glsl.max_var_size_in_kibytes
+  type: RelaxedAtomicInt32
+  value: -1 # -1 => default for platform, 0 => no limit, >0 => max valid size
+  mirror: always
+
+- name: webgl.glsl.max_private_var_size_in_bytes
+  type: RelaxedAtomicInt32
+  value: -1 # -1 => default for platform, 0 => no limit, >0 => max valid size
+  mirror: always
+
+- name: webgl.lose-context-on-memory-pressure
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.max-contexts
+  type: RelaxedAtomicUint32
+  value: 1000
+  mirror: always
+
+- name: webgl.max-contexts-per-principal
+  type: RelaxedAtomicUint32
+  value: 300
+  mirror: always
+
+- name: webgl.max-size-per-texture-mib
+  type: RelaxedAtomicUint32
+  value: 1024
+  mirror: always
+
+- name: webgl.max-vert-ids-per-draw
+  type: RelaxedAtomicUint32
+  value: 30*1000*1000
+  mirror: always
+
+- name: webgl.max-warnings-per-context
+  type: RelaxedAtomicUint32
+  value: 32
+  mirror: always
+
+- name: webgl.min_capability_mode
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.msaa-force
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.msaa-samples
+  type: RelaxedAtomicUint32
+  value: 4
+  mirror: always
+
+- name: webgl.out-of-process
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.out-of-process.worker
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.out-of-process.force
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.out-of-process.shmem-size
+  type: RelaxedAtomicUint32
+  value: 100000 # 100KB
+  mirror: always
+
+- name: webgl.out-of-process.async-present
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Forces async present to wait for a sync, even while using remote textures.
+- name: webgl.out-of-process.async-present.force-sync
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#if defined(MOZ_WIDGET_ANDROID)
+- name: webgl.out-of-process.enable-ahardwarebuffer
+  type: bool
+  value: false
+  mirror: once
+#endif
+
+# Override the blocklist to assume that GL is threadsafe.
+- name: webgl.threadsafe-gl.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+# Override the blocklist to assume that GL is not threadsafe.
+- name: webgl.threadsafe-gl.force-disabled
+  type: bool
+  value: false
+  mirror: once
+
+- name: webgl.use-canvas-render-thread
+  type: bool
+  value: true
+  mirror: once
+
+- name: webgl.override-unmasked-renderer
+  type: DataMutexString
+  value: ""
+  mirror: always
+
+- name: webgl.override-unmasked-vendor
+  type: DataMutexString
+  value: ""
+  mirror: always
+
+- name: webgl.power-preference-override
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: webgl.prefer-16bpp
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.sanitize-unmasked-renderer
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: webgl.allow-immediate-queries
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: webgl.allow-fb-invalidation
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+
+- name: webgl.perf.max-warnings
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: webgl.perf.max-acceptable-fb-status-invals
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+- name: webgl.perf.spew-frame-allocs
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+#---------------------------------------------------------------------------
+# Prefs starting with "widget."
+#---------------------------------------------------------------------------
+
+# Whether the non-native theme should always use system colors. Useful mostly
+# for testing forced colors mode.
+- name: widget.non-native-theme.always-high-contrast
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# The style of scrollbars to use. Here are the current options:
+#
+#   0: Default platform scrollbar style.
+#   1: macOS scrollbars
+#   2: GTK scrollbars
+#   3: Android scrollbars
+#   4: Windows 10 scrollbars
+#   5: Windows 11 scrollbars
+#
+# Note that switching to non-default scrollbars is experimental and other
+# scrollbar-related prefs may interfere with the experience. For example,
+# setting the GTK thumb size may have no effect when using non-GTK scrollbars
+# on GTK.
+- name: widget.non-native-theme.scrollbar.style
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# An override that allows to override the default platform size. The size in CSS
+# pixels at full zoom of the minimum scrollbar width.
+- name: widget.non-native-theme.scrollbar.size.override
+  type: uint32_t
+  value: 0
+  mirror: always
+
+# Whether we should use themed values for dark scrollbars.
+- name: widget.non-native-theme.scrollbar.dark-themed
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether the active thumb color should always use the themed colors, even if
+# dark scrollbars are in use.
+- name: widget.non-native-theme.scrollbar.active-always-themed
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we use the Windows CSS scrollbar sizes, or the scrollbar sizes
+# defined above.
+- name: widget.non-native-theme.win.scrollbar.use-system-size
+  type: bool
+  value: true
+  mirror: always
+
+# Whether Windows 11 scrollbars are always drawn with the thinner "overlay"
+# scrollbar style.
+- name: widget.non-native-theme.win11.scrollbar.force-overlay-style
+  type: bool
+  value: false
+  mirror: always
+
+# Whether Windows 11 overlay scrollbar tracks are round.
+- name: widget.non-native-theme.win11.scrollbar.round-track
+  type: bool
+  value: false
+  mirror: always
+
+# The amount of space that the thumb should fill the scrollbar, from zero to
+# one.
+- name: widget.non-native-theme.gtk.scrollbar.thumb-size
+  type: float
+  value: 0.75
+  mirror: always
+
+# The minimum size of the scroll thumb, in the scrollbar direction.
+- name: widget.non-native-theme.gtk.scrollbar.thumb-cross-size
+  type: uint32_t
+  value: 40
+  mirror: always
+
+# Whether the thumb should be rounded for the non-native scrollbars.
+- name: widget.non-native-theme.gtk.scrollbar.round-thumb
+  type: bool
+  value: true
+  mirror: always
+
+# Whether buttons shouldn't be suppressed for non-native scrollbars.
+- name: widget.non-native-theme.gtk.scrollbar.allow-buttons
+  type: bool
+  value: false
+  mirror: always
+
+# Whether we should use the default accent color or the theme-provided one for
+# content (e.g. for form controls and CSS system colors).
+#
+# Turned off on Windows, for now (we always use the default blue-ish
+# accent-color there). We might want to turn this on there, though it's worth
+# thinking on what the behavior should be for grey-ish accent colors (which are
+# a thing on Windows and can cause confusion with things like disabled form
+# controls). Maybe it's just fine.
+- name: widget.non-native-theme.use-theme-accent
+  type: RelaxedAtomicBool
+#if defined(XP_WIN) && !defined(MOZ_THUNDERBIRD)
+  value: false
+#else
+  value: true
+#endif
+  mirror: always
+
+# Preference to disable dark scrollbar implementation.
+# This is mainly for testing because dark scrollbars have to be semi-
+# transparent, but many reftests expect scrollbars to look identical
+# among different backgrounds.
+# However, some users may want to disable this as well.
+- name: widget.disable-dark-scrollbar
+  type: bool
+  value: false
+  mirror: always
+
+- name: widget.disable_file_pickers
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+- name: widget.window-transforms.disabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+#ifdef XP_MACOSX
+
+# Whether to shift by the menubar height on fullscreen mode.
+# 0: never
+# 1: always
+# 2: auto (tries to detect when it is needed)
+- name: widget.macos.shift-by-menubar-on-fullscreen
+  type: RelaxedAtomicUint32
+  value: 2
+  mirror: always
+
+- name: widget.macos.native-context-menus
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: widget.macos.sidebar-blend-mode.behind-window
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+- name: widget.macos.titlebar-blend-mode.behind-window
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+#endif
+
+# Whether native GTK global menubar support is enabled.
+# Disabled because there are some minor bugs and it needs deeper integration
+# with the front-end.
+- name: widget.gtk.global-menu.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether GTK global menubar support is enabled using wayland's experimental
+# dbus_annotation protocol:
+# https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/52
+# Disabled until it has a final shape and it is available in compositors.
+- name: widget.gtk.global-menu.wayland.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether native GTK context menus are enabled.
+# Disabled because at the very least there's missing custom icon support.
+- name: widget.gtk.native-context-menus
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether we use overlay scrollbars on GTK.
+- name: widget.gtk.overlay-scrollbars.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we hide the pointer while typing on Linux
+- name: widget.gtk.hide-pointer-while-typing.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether we honor the scrollbar colors from the gtk theme.
+- name: widget.gtk.theme-scrollbar-colors.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether libadwaita colors are used rather than the default ones.
+- name: widget.gtk.libadwaita-colors.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether to use gtk titlebar actions for middle click instead of Firefox
+# build in one
+- name: widget.gtk.titlebar-action-middle-click-enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to ignore middle click events on widget level.
+- name: widget.gtk.middle-click-enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we enable rounded bottom corners on GTK by default.
+#
+# The implementation is a bit hacky (see details in bug 1850827) so behind a
+# pref for emergency purposes.
+- name: widget.gtk.rounded-bottom-corners.enabled
+  type: bool
+  value: false
+  mirror: always
+  rust: true
+
+# Whether non-native titlebar buttons are enabled for lightweight themes.
+- name: widget.gtk.non-native-titlebar-buttons.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether selection colors for the non-system theme get passed from the system
+# GTK theme.
+- name: widget.gtk.alt-theme.selection
+  type: bool
+  value: true
+  mirror: always
+
+# Whether form control accent colors for the non-system theme get passed from
+# the system GTK theme.
+- name: widget.gtk.alt-theme.accent
+  type: bool
+  value: true
+  mirror: always
+
+# Whether the scrollbar thumb active color from the non-system theme gets
+# passed from the system GTK theme.
+- name: widget.gtk.alt-theme.scrollbar_active
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we should try to grab the pointer on popups.
+#  0: Never
+#  1: Always
+#  2: Auto (depending on the system)
+- name: widget.gtk.grab-pointer
+  type: int32_t
+  value: 2
+  mirror: always
+
+# Whether we should try ignore bogus leave-notify events from the window
+# manager.
+#  0: Never
+#  1: Always
+#  2: Auto (depending on the system)
+- name: widget.gtk.ignore-bogus-leave-notify
+  type: int32_t
+  value: 2
+  mirror: always
+
+# Whether to use gtk legacy cursor API.
+- name: widget.gtk.legacy-cursors.enabled
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to use gtk high contrast themes to disable content styling like on
+# windows high contrast mode.
+- name: widget.content.gtk-high-contrast.enabled
+  type: bool
+  value: true
+  mirror: always
+
+#ifdef MOZ_WAYLAND
+- name: widget.wayland.fractional-scale.enabled
+  type: bool
+  value: false
+  mirror: once
+
+# Use opaque region for MozContainer wl_surface
+- name: widget.wayland.opaque-region.enabled
+  type: bool
+  value: true
+  mirror: once
+
+# Use frame callback based vsync
+- name: widget.wayland.vsync.enabled
+  type: bool
+  value: true
+  mirror: once
+
+# Whether to keep firing vsync at layout.throttled_frame_rate after we've been
+# occluded.
+- name: widget.wayland.vsync.keep-firing-at-idle
+  type: bool
+  value: false
+  mirror: always
+#endif
+
+#ifdef MOZ_WIDGET_GTK
+# Whether to use DMABuf backend.
+- name: widget.dmabuf.enabled
+  type: bool
+  value: true
+  mirror: once
+
+# Whether to override the DMABuf blocklist.
+- name: widget.dmabuf.force-enabled
+  type: bool
+  value: false
+  mirror: once
+
+#ifdef NIGHTLY_BUILD
+# Keep those pref hidden on non-nightly builds to avoid people accidentally
+# turning it on.
+
+# Use DMABuf for content textures.
+# For testing purposes only.
+- name: widget.dmabuf-textures.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+#endif
+
+# Use DMABuf backend for WebGL.
+- name: widget.dmabuf-webgl.enabled
+  type: bool
+  value: true
+  mirror: once
+
+# Use gdk_window_move_to_rect to move Wayland popups when available.
+- name: widget.wayland.use-move-to-rect
+  type: bool
+  value: true
+  mirror: once
+
+# The time we should spend on a DBUS call to the FileManager1 interface before
+# giving up and trying an alternative method.
+#
+# -1 for the default system timeout, INT_MAX for "infinite time".
+#
+# This happens right now on the main thread so 1 second should be enough, we
+# should consider moving it to a background task and just use the default
+# timeout.
+- name: widget.gtk.file-manager-show-items-timeout-ms
+  type: int32_t
+  value: 1000
+  mirror: always
+
+# The timeout we should spend on a DBUS call to the Settings proxy before
+# giving up.
+#
+# -1 for the default system timeout, INT_MAX for "infinite time".
+#
+# This runs just once, but during startup, so make sure it doesn't take too
+# long. Three seconds should be way more than enough, and if we don't get the
+# reply on time then the only potential issue is that we use a light instead of
+# dark interface or vice versa.
+- name: widget.gtk.settings-portal-timeout-ms
+  type: int32_t
+  value: 3000
+  mirror: always
+
+# Whether to use gtk portal for the file picker.
+#  - 0: never
+#  - 1: always
+#  - 2: auto (true for flatpak or GTK_USE_PORTAL=1, false otherwise)
+- name: widget.use-xdg-desktop-portal.file-picker
+  type: int32_t
+  value: 2
+  mirror: always
+
+# Whether to use gtk portal for the mime handler.
+#  - 0: never
+#  - 1: always
+#  - 2: auto (for now only true for flatpak, see bug 1516290)
+- name: widget.use-xdg-desktop-portal.mime-handler
+  type: int32_t
+  value: 2
+  mirror: always
+
+# Whether to use XDG portal for native messaging.
+# https://github.com/flatpak/xdg-desktop-portal/issues/655
+#  - 0: never
+#  - 1: always
+#  - 2: auto (true for snap and flatpak or GTK_USE_PORTAL=1, false otherwise)
+- name: widget.use-xdg-desktop-portal.native-messaging
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Whether to try to use XDG portal for settings / look-and-feel information.
+# https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.portal.Settings
+#  - 0: never
+#  - 1: always
+#  - 2: auto
+- name: widget.use-xdg-desktop-portal.settings
+  type: int32_t
+  value: 2
+  mirror: always
+
+# Whether to use XDG portal for geolocation.
+# https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.portal.Location
+#  - 0: never
+#  - 1: always
+#  - 2: auto
+- name: widget.use-xdg-desktop-portal.location
+  type: int32_t
+  value: 2
+  mirror: always
+# Whether to use XDG portal for opening to a file.
+# https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.portal.OpenURI
+#  - 0: never
+#  - 1: always
+#  - 2: auto (true for flatpak or GTK_USE_PORTAL=1, false otherwise)
+- name: widget.use-xdg-desktop-portal.open-uri
+  type: int32_t
+  value: 2
+  mirror: always
+#endif
+
+#ifdef XP_WIN
+# WindowsUIUtils::Share to wait for user action on Windows share dialog
+# `true` means the promise resolves when user completes or cancels the share
+# action. This can be unsafe since selecting copy action fires no DataPackage
+# event as of 21H1.
+# `false` means the promise resolves when the share data is passed to
+# DataPackage.
+# This affects the behavior of `navigator.share()`.
+- name: widget.windows.share.wait_action.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: widget.windows.window_occlusion_tracking.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether overlay scrollbars respect the system settings.
+# Note that these can be overridden by the ui.useOverlayScrollbars pref.
+- name: widget.windows.overlay-scrollbars.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we allow accessing the UWP system color pallete.
+- name: widget.windows.uwp-system-colors.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether we use the accent color for highlight as some other UWP apps do.
+#
+# false for now since it can cause some contrast-with-background issues
+# specially with grey accents, see bug 1776588.
+- name: widget.windows.uwp-system-colors.highlight-accent
+  type: bool
+  value: false
+  mirror: always
+
+- name: widget.windows.window_occlusion_tracking_display_state.enabled
+  type: bool
+  value: false
+  mirror: always
+
+- name: widget.windows.window_occlusion_tracking_session_lock.enabled
+  type: bool
+  value: true
+  mirror: always
+
+# Whether this device is capable of entering tablet mode. (Win11+ only.)
+#
+# Valid values:
+#  * -1: assume this device is tablet-mode-incapable
+#  *  0: rely on heuristics
+#  *  1: assume this device is tablet-mode-capable
+- name: widget.windows.tablet_detection_override
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Whether to give explorer.exe a delated nudge to recalculate the fullscreenness
+# of a window after maximizing it.
+- name: widget.windows.fullscreen_remind_taskbar
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
+# Whether to open the Windows file and folder pickers "remotely" (in a utility
+# process) or "locally" (in the main process).
+#
+# Valid values:
+#  *  0: auto (possibly release-channel-dependent)
+#  *  1: remotely, falling back to locally
+#  *  2: remotely, no fallback
+#  *  3: remotely, falling back to locally except on crashes
+#  * -1: locally, no fallback
+- name: widget.windows.utility_process_file_picker
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# The number of messages of each type to keep for display in
+# about:windows-messages
+- name: widget.windows.messages_to_log
+  type: RelaxedAtomicUint32
+  value: 6
+  mirror: always
+
+# Whether to flush the Ole clipboard synchronously.
+# Possible values are:
+#  * 0: never
+#  * 1: always
+#  * 2 (or others): when needed
+- name: widget.windows.sync-clipboard-flush
+  type: uint32_t
+  value: 2
+  mirror: always
+
+# Whether to allow dragging and dropping tabs onto another application. This is
+# disallowed by default because most applications that say they can handle
+# Firefox tabs are lying (bug 1598915).
+- name: widget.windows.allow-external-tab-drag
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to apply a hack (adjusting the window height by -1px and back again)
+# upon first entering fullscreen intended to work around a bug exhibited under
+# on some Windows 11 machines under some configurations. (See bug 1763981.)
+#
+# Semantics:
+#  * 0: never
+#  * 1: always
+#  * 2: auto
+- name: widget.windows.apply-dwm-resize-hack
+  type: RelaxedAtomicInt32
+  value: 2
+  mirror: always
+
+# Whether to apply a very old hack (reposting and reprocessing scroll-wheel
+# messages under custom message IDs) originally intended to work around
+# plugin-process deadlocks. (See bug 658194.)
+- name: widget.windows.old-scrollwheel-message-hack
+  type: bool
+  value: false
+  mirror: always
+
+# Whether we use the mica backdrop. Off by default for now.
+- name: widget.windows.mica
+  type: bool
+  value: false
+  mirror: once
+#endif
+
+# Whether to disable SwipeTracker (e.g. swipe-to-nav).
+- name: widget.disable-swipe-tracker
+  type: bool
+  value: false
+  mirror: always
+
+# Various metrics to control SwipeTracker.
+- name: widget.swipe.velocity-twitch-tolerance
+  type: float
+  value: 0.0000001f
+  mirror: always
+
+- name: widget.swipe.success-velocity-contribution
+  type: float
+  value: 0.05f
+  mirror: always
+
+# When using pixel deltas for pan input, how many pixels do we consider a whole
+# swipe?
+#
+# The values for this pref are derived from trial and error in an effort to
+# match the existing behavior on the respective platforms.
+- name: widget.swipe.pixel-size
+  type: float
+#if defined(XP_MACOSX)
+  value: 550.0f
+#else
+  value: 1100.0f
+#endif
+  mirror: always
+
+# When using page deltas for pan input, how many pages do we consider a whole
+# swipe navigation?
+#
+# This is only relevant for GTK which is as of right now the only platform
+# which supports page-based pan gestures.
+- name: widget.swipe.page-size
+  type: float
+  value: 40.0f
+  mirror: always
+
+- name: widget.transparent-windows
+  type: bool
+  value: true
+  mirror: once
+
+# Whether the clipboard cached are used while getting system clipboard data.
+- name: widget.clipboard.use-cached-data.enabled
+  type: bool
+#if defined(XP_MACOSX)
+  value: true
+#else
+  value: false
+#endif
+  mirror: always
+
+#ifdef XP_MACOSX
+# The folllowing widget.macos.automatic.* prefs are whether Gecko turns on
+# text replacement features.
+- name: widget.macos.automatic.text_replacement
+  type: bool
+  value: true
+  mirror: always
+
+# Whether the smart dash feature is enabled
+- name: widget.macos.automatic.dash_substitution
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the smart quote feature is enabled
+- name: widget.macos.automatic.quote_substitution
+  type: bool
+  value: false
+  mirror: always
+
+# fetching length when processing text substitution.
+- name: widget.macos.automatic.text_substitution_fetch_length
+  type: uint32_t
+  value: 20
+  mirror: always
+#endif
+
+# Whether to render in to a child SurfaceControl rather than directly into the SurfaceView
+- name: widget.android.use-surfacecontrol
+  type: bool
+  value: false
+  mirror: once
+
+#ifdef ANDROID
+# A threshold value for double click by mouse.
+- name: widget.double-click.threshold
+  type: RelaxedAtomicInt32
+  value: 4
+  mirror: always
+
+# A timeout value for double click by mouse.
+- name: widget.double-click.timeout
+  type: RelaxedAtomicInt32
+  value: 500
+  mirror: always
+
+# A min time value for double click by mouse.
+- name: widget.double-click.min
+  type: RelaxedAtomicInt32
+  value: 40
+  mirror: always
+#endif
+
+#---------------------------------------------------------------------------
+# Prefs starting with "zoom."
+#---------------------------------------------------------------------------
+
+- name: zoom.maxPercent
+  type: uint32_t
+#ifdef ANDROID
+  value: 400
+#else
+  value: 500
+#endif
+  mirror: always
+
+- name: zoom.minPercent
+  type: uint32_t
+#ifdef ANDROID
+  value: 20
+#else
+  value: 30
+#endif
+  mirror: always
+
+#---------------------------------------------------------------------------
+# End of prefs
+#---------------------------------------------------------------------------