oops, gFocusedDocument is from ben's fullscreen landing.

suite/browser/navigator.js

@@ -63,7 +63,6 @@ var gBrowser = null;
 
 // focused frame URL
 var gFocusedURL = null;
-var gFocusedDocument = null;
 
 /**
 * We can avoid adding multiple load event listeners and save some time by adding
@@ -100,7 +99,6 @@ function contentAreaFrameFocus()
   var focusedWindow = document.commandDispatcher.focusedWindow;
   if (isDocumentFrame(focusedWindow)) {
     gFocusedURL = focusedWindow.location.href;
-    gFocusedDocument = focusedWindow.document;
   }
 }