gh-15026: Improve scrolling performance (gh-15306)

prefs/README.md

@@ -4,4 +4,4 @@ This directory contains configuration files for Zen. They are divided by folder
 
 - `firefox/`: Preferences to override Firefox defaults.
 - `zen/`: Preferences to configure Zen-specific features.
-- `privatefox/` & `fastfox/`: _Some_ of the preferences got extracted from [Betterfox](https://github.com/yokoffing/Betterfox).
+- `privatefox/`: _Some_ of the preferences got extracted from [Betterfox](https://github.com/yokoffing/Betterfox).

prefs/fastfox/smoothscroll.yaml

@@ -1,49 +0,0 @@
-# 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/.
-
-# Smooth scrolling and mousewheel tuning preferences
-
-- name: general.smoothScroll.msdPhysics.enabled
-  condition: "!defined(XP_MACOSX)"
-  value: true
-
-- name: general.smoothScroll.currentVelocityWeighting
-  condition: "!defined(XP_MACOSX)"
-  value: "0.15"
-
-- name: general.smoothScroll.stopDecelerationWeighting
-  condition: "!defined(XP_MACOSX)"
-  value: "0.6"
-
-- name: mousewheel.min_line_scroll_amount
-  condition: "!defined(XP_MACOSX)"
-  value: 10
-
-- name: general.smoothScroll.mouseWheel.durationMinMS
-  condition: "!defined(XP_MACOSX)"
-  value: 80
-
-- name: general.smoothScroll.msdPhysics.continuousMotionMaxDeltaMS
-  condition: "!defined(XP_MACOSX)"
-  value: 12
-
-- name: general.smoothScroll.msdPhysics.motionBeginSpringConstant
-  condition: "!defined(XP_MACOSX)"
-  value: 600
-
-- name: general.smoothScroll.msdPhysics.regularSpringConstant
-  condition: "!defined(XP_MACOSX)"
-  value: 650
-
-- name: general.smoothScroll.msdPhysics.slowdownMinDeltaMS
-  condition: "!defined(XP_MACOSX)"
-  value: 25
-
-- name: general.smoothScroll.msdPhysics.slowdownSpringConstant
-  condition: "!defined(XP_MACOSX)"
-  value: 250
-
-- name: mousewheel.default.delta_multiplier_y
-  condition: "!defined(XP_MACOSX)"
-  value: 200

src/zen/common/sys/ZenUIMigration.sys.mjs

@@ -12,7 +12,7 @@ ChromeUtils.defineESModuleGetters(lazy, {
 
 class nsZenUIMigration {
   PREF_NAME = "zen.ui.migration.version";
-  MIGRATION_VERSION = 7;
+  MIGRATION_VERSION = 8;
 
   init(isNewProfile) {
     if (!isNewProfile) {
@@ -164,6 +164,18 @@ class nsZenUIMigration {
       Services.prefs.setBoolPref("zen.widget.macos.window-vibrancy", false);
     }
   }
+
+  _migrateV8() {
+    // A version mismatch in the downloadable gfx blocklist wrongly blocked
+    // video overlays for every Windows user. The status pref persists in the
+    // profile and short-circuits the blocklist evaluation, so clear it (and
+    // its failure id) and restart, since gfx is already initialized by now.
+    if (Services.prefs.prefHasUserValue("gfx.blacklist.video-overlay")) {
+      Services.prefs.clearUserPref("gfx.blacklist.video-overlay");
+      Services.prefs.clearUserPref("gfx.blacklist.video-overlay.failureid");
+      this.shouldRestart = true;
+    }
+  }
 }
 
 export var gZenUIMigration = new nsZenUIMigration();