Favicons zurück in die Adressleiste?

//  FavIconInUrlBar.uc.js

(function() {

    if (location != 'chrome://browser/content/browser.xhtml')
        return;
    
    var fav = document.createXULElement('image');
    fav.setAttribute('id', 'faviconid');
    fav.setAttribute('class', 'faviconclass');

    gBrowser.tabContainer.addEventListener('TabAttrModified', function() {            
     
    var favicon = gBrowser.selectedTab.image;
      
    if (favicon)
    {    
        fav.src = favicon;
        
        var position = document.getElementById('identity-icon');
        position.parentNode.insertBefore(fav, position.previousSibling);
    }
    else
    {
        fav.removeAttribute('src');
    }
    
 }, false);
 
    fav.style.height = '16px';
    fav.style.width  = '16px';
    fav.style.marginLeft  = '5px';
 
})();