--- a/browser/chrome/browser/browser.dtd
+++ b/browser/chrome/browser/browser.dtd
@@ -384,22 +384,16 @@ These should match what Safari and other
 
 <!ENTITY openCmd.commandkey           "l">
 <!ENTITY urlbar.placeholder2          "Saisir un terme à rechercher ou une adresse">
 <!-- LOCALIZATION NOTE (urlbar.accesskey): do NOT change this "accesskey"
      this is the ALT+D shortcut from IE -->
 <!ENTITY urlbar.accesskey             "d">
 <!ENTITY urlbar.switchToTab.label     "Aller à l'onglet :">
 
-<!-- LOCALIZATION NOTE (toggleMenuPanelMac.key) ideally this should be the same as
-     toggleMenuPanel. However, the modifier is different on mac (cmd+shift rather than ctrl)
-     and so you may need to pick a different key to avoid conflicts with other shortcuts. -->
-<!ENTITY toggleMenuPanel.key          "m">
-<!ENTITY toggleMenuPanelMac.key       "m">
-
 <!--
   Comment duplicated from browser-sets.inc:
 
   Search Command Key Logic works like this:
 
   Unix: Ctrl+J (0.8, 0.9 support)
         Ctrl+K (cross platform binding)
   Mac:  Cmd+K (cross platform binding)