diff --git a/widget/gtk/nsWindow.cpp b/widget/gtk/nsWindow.cpp
--- a/widget/gtk/nsWindow.cpp
+++ b/widget/gtk/nsWindow.cpp
@@ -2870,6 +2870,7 @@
 
   if (!gFocusWindow || gFocusWindow->IsDestroyed()) {
     LOGW("  missing gFocusWindow, quit.");
+    return;
   }
 
   RefPtr<nsWaylandDisplay> display = WaylandDisplayGet();