rem: if (content) content.focus() 
add: if (content) content.focus(); 
context:   destroyContextMenu: function (aEvent)  {    if (content)       content.focus()    BookmarksMenuDNDObserver.onDragRemoveFeedBack(document.popupNode); // needed on cancel    aEvent.target.removeEventListener("mousemove", BookmarksMenuController.onMouseMove, false)  },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/aeed86925caf14b5dde8cee23d020017d009b412/bookmarksMenu.js/buggy/xpfe/components/bookmarks/resources/bookmarksMenu.js