diff --git a/widget/cocoa/nsMenuX.h b/widget/cocoa/nsMenuX.h
index ff78196ea724..5f540f053872 100644
--- a/widget/cocoa/nsMenuX.h
+++ b/widget/cocoa/nsMenuX.h
@@ -34,7 +34,6 @@ class nsIWidget;
 - (id)initWithGeckoMenu:(nsMenuX*)geckoMenu;
 - (void)runBlockWhenOpen:(void (^)())block;
 - (void)menu:(NSMenu*)menu willActivateItem:(NSMenuItem*)item;
-@property BOOL menuIsInMenubar;
 @end
 
 class nsMenuXObserver {
diff --git a/widget/cocoa/nsMenuX.mm b/widget/cocoa/nsMenuX.mm
index 97d934205434..792730b628da 100644
--- a/widget/cocoa/nsMenuX.mm
+++ b/widget/cocoa/nsMenuX.mm
@@ -88,7 +88,6 @@ nsMenuX::nsMenuX(nsMenuParentX* aParent, nsMenuGroupOwnerX* aMenuGroupOwner, nsI
   SwizzleDynamicIndexingMethods();
 
   mMenuDelegate = [[MenuDelegate alloc] initWithGeckoMenu:this];
-  mMenuDelegate.menuIsInMenubar = mMenuGroupOwner->GetMenuBar() != nullptr;
 
   if (!nsMenuBarX::sNativeEventTarget) {
     nsMenuBarX::sNativeEventTarget = [[NativeMenuItemTarget alloc] init];
@@ -1153,20 +1152,6 @@ void nsMenuX::Dump(uint32_t aIndent) const {
     return;
   }
 
-  if (self.menuIsInMenubar) {
-    // If a menu in the menubar is trying open while a non-native menu is open, roll up the
-    // non-native menu and reject the menubar opening attempt, effectively consuming the event.
-    nsIRollupListener* rollupListener = nsBaseWidget::GetActiveRollupListener();
-    if (rollupListener) {
-      nsCOMPtr<nsIWidget> rollupWidget = rollupListener->GetRollupWidget();
-      if (rollupWidget) {
-        rollupListener->Rollup({0, nsIRollupListener::FlushViews::Yes});
-        [menu cancelTracking];
-        return;
-      }
-    }
-  }
-
   // Hold a strong reference to mGeckoMenu while calling its methods.
   RefPtr<nsMenuX> geckoMenu = mGeckoMenu;
   geckoMenu->MenuOpened();