add: document.getElementById("bookmarks-chevron").parentNode, 
context:   get mObservers ()  {    if (!this._observers) {      this._observers = [        document.getElementById("bookmarks-ptf"),        document.getElementById("BookmarksMenu").parentNode,        document.getElementById("PersonalToolbar")      ]    }    return this._observers;  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9421/921691ef7201dcaeffe1411963985bc72ada7d28/bookmarksMenu.js/clean/suite/common/bookmarks/bookmarksMenu.js