diff --git a/layout/xul/nsMenuFrame.cpp b/layout/xul/nsMenuFrame.cpp
index 087323a875..30cab242ea 100644
--- a/layout/xul/nsMenuFrame.cpp
+++ b/layout/xul/nsMenuFrame.cpp
@@ -1273,7 +1273,9 @@ nsMenuFrame::PassMenuCommandEventToPopupManager()
   nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
   nsMenuParent* menuParent = GetMenuParent();
   if (pm && menuParent && mDelayedMenuCommandEvent) {
-    pm->ExecuteMenu(mContent, mDelayedMenuCommandEvent);
+    nsCOMPtr<nsIContent> content = mContent;
+    RefPtr<nsXULMenuCommandEvent> event = mDelayedMenuCommandEvent;
+    pm->ExecuteMenu(content, event);
   }
   mDelayedMenuCommandEvent = nullptr;
 }