Bug 258864 : View > 'Full Screen' menu entry does not become ticked / checked when in full screen mode, patch by David Tenser (djst) <djst.mozilla@gmail.com>, r=mconnor

browser/base/content/browser-menubar.inc

@@ -303,6 +303,8 @@
                 <menuitem accesskey="&pageSourceCmd.accesskey;" label="&pageSourceCmd.label;" key="key_viewSource" command="View:PageSource"/>
                 <menuitem accesskey="&fullScreenCmd.accesskey;"
                           label="&fullScreenCmd.label;" key="key_fullScreen"
+                          id="fullScreenItem"
+                          type="checkbox"
                           command="View:FullScreen"/>
                 <menuseparator hidden="true" id="documentDirection-separator"/>
                 <menuitem hidden="true" id="documentDirection-swap" 

browser/base/content/browser.js

@@ -3071,6 +3071,7 @@ var FullScreen =
     // show/hide all menubars, toolbars, and statusbars (except the full screen toolbar)
     this.showXULChrome("toolbar", window.fullScreen);
     this.showXULChrome("statusbar", window.fullScreen);
+    document.getElementById("fullScreenItem").setAttribute("checked", !window.fullScreen);
   },
 
   showXULChrome: function(aTag, aShow)