146.0 (#447)

Fastfox.js

@@ -117,6 +117,15 @@ user_pref("gfx.content.skia-font-cache-size", 32); // 32 MB; default=5; Chrome=2
 //user_pref("gfx.webrender.compositor", true); // DEFAULT WINDOWS macOS
     //user_pref("gfx.webrender.compositor.force-enabled", true); // enforce
 
+// PREF: Webrender layer compositor
+// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1945683
+// [2] https://www.reddit.com/r/firefox/comments/1p58qre/firefox_is_getting_ready_to_make_youtube_fast/
+// [3] https://www.ghacks.net/2025/11/24/these-two-tweaks-should-improve-firefoxs-performance-on-youtube-significantly/
+user_pref("gfx.webrender.layer-compositor", true);
+    // If your PC uses an AMD GPU, you might want to make a second change.
+    // This one improves CPU usage on AMD systems.
+    //user_pref("media.wmf.zero-copy-nv12-textures-force-enabled", true);
+
 // PREF: if your hardware doesn't support Webrender, you can fallback to Webrender's software renderer
 // [1] https://www.ghacks.net/2020/12/14/how-to-find-out-if-webrender-is-enabled-in-firefox-and-how-to-enable-it-if-it-is-not/
 //user_pref("gfx.webrender.software", true); // Software Webrender uses CPU instead of GPU

Securefox.js

@@ -87,8 +87,8 @@ user_pref("browser.contentblocking.category", "strict"); // [HIDDEN PREF]
 // [1] https://www.reddit.com/r/firefox/comments/l79nxy/firefox_dev_is_ignoring_social_tracking_preference/gl84ukk
 // [2] https://www.reddit.com/r/firefox/comments/pvds9m/reddit_embeds_not_loading/
 // [3] https://github.com/yokoffing/Betterfox/issues/413
-//user_pref("urlclassifier.trackingSkipURLs", "embed.reddit.com, *.twitter.com, *.twimg.com"); // MANUAL [FF136+]
-//user_pref("urlclassifier.features.socialtracking.skipURLs", "*.twitter.com, *.twimg.com"); // MANUAL [FF136+]
+//user_pref("urlclassifier.trackingSkipURLs", "*://embed.reddit.com/*,*://*.twitter.com/*,*://*.twimg.com/*"); // MANUAL
+//user_pref("urlclassifier.features.socialtracking.skipURLs", "*://*.twitter.com/*,*://*.twimg.com/*"); // MANUAL
 
 // PREF: allow embedded tweets, Instagram and Reddit posts, and TikTok embeds [before FF136+]
 //user_pref("urlclassifier.trackingSkipURLs", "*.reddit.com, *.twitter.com, *.twimg.com, *.tiktok.com"); // MANUAL

user.js

@@ -21,6 +21,7 @@
 user_pref("gfx.content.skia-font-cache-size", 32);
 
 /** GFX ***/
+user_pref("gfx.webrender.layer-compositor", true);
 user_pref("gfx.canvas.accelerated.cache-items", 32768);
 user_pref("gfx.canvas.accelerated.cache-size", 4096);
 user_pref("webgl.max-size", 16384);
@@ -235,4 +236,3 @@ user_pref("layout.word_select.eat_space_to_next_word", false);
 /****************************************************************************
  * END: BETTERFOX                                                           *
 ****************************************************************************/
-