changed default user agent to "Firefox" to fix google/youtube pages not working

README.md

@@ -65,6 +65,7 @@ Here are the details of each parameter used in the patching system:
   1. **`standard`:** Standard patching type that follows the `+` (add) and `-` (remove) syntax.
 
      - Used for general file modifications.
+     - Supports multi-line block matching: the entire `-` block must be present to be replaced by the `+` block.
      - **Example:**
        ```patch
        i: /browser/branding/official/configure.sh
@@ -73,6 +74,21 @@ Here are the details of each parameter used in the patching system:
        -MOZ_APP_DISPLAYNAME=Firefox
        +MOZ_APP_DISPLAYNAME=Spitfire
        ```
+      - **Multi-line example:**
+       ```patch
+        -project_flag(
+        -    env="MOZ_APP_UA_NAME",
+        -    default="",
+        -    nargs=1,
+        -    help="application name in the User Agent string",
+        -)
+        +project_flag(
+        +    env="MOZ_APP_UA_NAME",
+        +    default="Firefox",
+        +    nargs=1,
+        +    help="application name in the User Agent string",
+        +)
+      ```
 
      Note: *Type will fallback to t:standard when no type is specified.*
   2. **`pref`:** Indicates that the patch is modifying preference settings (e.g., Firefox `prefs.js`).