pretty good

app/lib/features/geckoview/domain/controllers/bottom_sheet.dart

@@ -29,7 +29,9 @@ class BottomSheetExtend extends _$BottomSheetExtend {
   late StreamController<double> _extentStreamController;
 
   void add(double extent) {
-    _extentStreamController.add(extent);
+    if (!_extentStreamController.isClosed) {
+      _extentStreamController.add(extent);
+    }
   }
 
   @override

app/lib/features/geckoview/domain/controllers/bottom_sheet.g.dart

@@ -23,7 +23,7 @@ final bottomSheetControllerProvider =
 );
 
 typedef _$BottomSheetController = AutoDisposeNotifier<Sheet?>;
-String _$bottomSheetExtendHash() => r'81ae254499d1d7f57309274b0f18747b94d6dda3';
+String _$bottomSheetExtendHash() => r'7e11b9047c15bdeb4dfcb488a8573daadb64e25c';
 
 /// See also [BottomSheetExtend].
 @ProviderFor(BottomSheetExtend)