decouple form parent when switching cookie context

app/lib/features/geckoview/domain/repositories/tab.dart

@@ -455,11 +455,19 @@ class TabRepository extends _$TabRepository {
                 tabState.historyState.items.isEmpty;
 
             if (event.blocked || tabIsEmpty) {
+              // Check if contextual identity is changing
+              final currentContainerData = await ref
+                  .read(tabDataRepositoryProvider.notifier)
+                  .getTabContainerData(tabState.id);
+
+              final contextChanging = containerData.metadata.contextualIdentity !=
+                  currentContainerData?.metadata.contextualIdentity;
+
               await addTab(
                 url: uri,
                 private: tabState.isPrivate,
                 container: Value(containerData),
-                parentId: tabState.id,
+                parentId: contextChanging ? null : tabState.id, // Break parent chain if context changes
                 selectTab: true,
               );
 

app/lib/features/geckoview/domain/repositories/tab.g.dart

@@ -41,7 +41,7 @@ final class TabRepositoryProvider
   }
 }
 
-String _$tabRepositoryHash() => r'0be3f9bb9eef6dfff1c486195e2717932c425db1';
+String _$tabRepositoryHash() => r'93afd4b4b6d007f02707bda0b860730b0dba5c5f';
 
 abstract class _$TabRepository extends $Notifier<void> {
   void build();

app/lib/features/geckoview/features/tabs/domain/repositories/tab.dart

@@ -58,7 +58,7 @@ class TabDataRepository extends _$TabDataRepository {
               url: tabState.url,
               private: tabState.isPrivate,
               container: Value(targetContainer),
-              parentId: tabState.parentId,
+              // parentId defaults to null - breaks parent chain when changing contextual identity
               selectTab: selectedTabId == tabState.id,
             );
       }
@@ -86,7 +86,7 @@ class TabDataRepository extends _$TabDataRepository {
               url: tabState.url,
               private: tabState.isPrivate,
               container: const Value(null),
-              parentId: tabState.parentId,
+              // parentId defaults to null - breaks parent chain when removing contextual identity
               selectTab: selectedTabId == tabState.id,
             );
       }

app/lib/features/geckoview/features/tabs/domain/repositories/tab.g.dart

@@ -41,7 +41,7 @@ final class TabDataRepositoryProvider
   }
 }
 
-String _$tabDataRepositoryHash() => r'502f2ce548d3a4d1506d239c9a2e506b9436c408';
+String _$tabDataRepositoryHash() => r'a01c38e94aad2145bd26aa0b8ff0bb1bcceb22f5';
 
 abstract class _$TabDataRepository extends $Notifier<void> {
   void build();