diff --git a/extensions/inspector/resources/content/toolboxOverlay.xul b/extensions/inspector/resources/content/toolboxOverlay.xul
index 524834ecde8d..13e1d217276f 100644
--- a/extensions/inspector/resources/content/toolboxOverlay.xul
+++ b/extensions/inspector/resources/content/toolboxOverlay.xul
@@ -30,6 +30,7 @@
 
     <menu id="tasksMenu"/> <!-- Seamonkey -->
     <menu id="windowMenu"/> <!-- Firefox-mac -->
+    <menupopup id="menu_ToolsPopup"/> <!-- Firefox-mac -->
     <menu id="menu_Help"/> <!-- Seamonkey -->
     <menu id="helpMenu"/>  <!-- Firefox -->