add: window.XULBrowserWindow.init(); 
context: function BrowserToolbarChanged(){  gURLBar = document.getElementById("urlbar");  gProxyButton = document.getElementById("page-proxy-button");  gProxyFavIcon = document.getElementById("page-proxy-favicon");  gProxyDeck = document.getElementById("page-proxy-deck");  var homeButton = document.getElementById("home-button");  if (homeButton)    homeButton.setAttribute("tooltiptext", homePage);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/c49b0305715b2029f88a6c468676c98d0a911a7d/browser.js/buggy/browser/base/content/browser.js