respect disableAnimations flag

app/lib/features/geckoview/features/browser/presentation/screens/browser.dart

@@ -76,8 +76,10 @@ class _AnimatedToolbar extends HookWidget {
 
   @override
   Widget build(BuildContext context) {
+    final disableAnimations = MediaQuery.disableAnimationsOf(context);
+
     final controller = useAnimationController(
-      duration: _kAnimationDuration,
+      duration: disableAnimations ? Duration.zero : _kAnimationDuration,
       initialValue: visible ? 1.0 : 0.0,
     );
 

app/lib/features/geckoview/features/browser/presentation/widgets/browser_menu_sheet.dart

@@ -618,10 +618,7 @@ class _PinTopSiteTile extends HookConsumerWidget {
           } else {
             await ref
                 .read(topSiteRepositoryProvider.notifier)
-                .addPinnedSite(
-                  title: tabState.titleOrAuthority,
-                  url: url,
-                );
+                .addPinnedSite(title: tabState.titleOrAuthority, url: url);
             if (context.mounted) {
               ui_helper.showInfoMessage(context, 'Pinned to Top Sites');
             }
@@ -1932,19 +1929,21 @@ class _SyncTile extends HookConsumerWidget {
     );
     final isSyncing = syncStarted || syncInfo?.syncing == true;
 
+    final disableAnimations = MediaQuery.disableAnimationsOf(context);
+
     final controller = useAnimationController(
-      duration: const Duration(seconds: 2),
+      duration: disableAnimations ? Duration.zero : const Duration(seconds: 2),
     );
 
     useEffect(() {
-      if (isSyncing) {
+      if (isSyncing && !disableAnimations) {
         unawaited(controller.repeat());
       } else {
         controller.stop();
         controller.reset();
       }
       return null;
-    }, [isSyncing]);
+    }, [isSyncing, disableAnimations]);
 
     return ListTile(
       leading: RotationTransition(

app/lib/features/geckoview/features/browser/presentation/widgets/draggable_scrollable_header.dart

@@ -74,6 +74,11 @@ class _DraggableScrollableHeaderState extends State<DraggableScrollableHeader>
     double targetSize, {
     Duration? customDuration,
   }) async {
+    if (MediaQuery.disableAnimationsOf(context)) {
+      widget.controller.jumpTo(targetSize);
+      return;
+    }
+
     if (customDuration != null) {
       _animationController.duration = customDuration;
     } else {

app/lib/features/sync/presentation/screens/sync_settings.dart

@@ -53,19 +53,21 @@ class SyncSettingsScreen extends HookConsumerWidget {
       return 'Last synced: $formattedDate';
     }, [syncInfo, isSyncing]);
 
+    final disableAnimations = MediaQuery.disableAnimationsOf(context);
+
     final syncController = useAnimationController(
-      duration: const Duration(seconds: 2),
+      duration: disableAnimations ? Duration.zero : const Duration(seconds: 2),
     );
 
     useEffect(() {
-      if (isSyncing) {
+      if (isSyncing && !disableAnimations) {
         unawaited(syncController.repeat());
       } else {
         syncController.stop();
         syncController.reset();
       }
       return null;
-    }, [isSyncing]);
+    }, [isSyncing, disableAnimations]);
 
     return Scaffold(
       appBar: AppBar(title: const Text('Firefox Sync')),