add: this.domain = prefName; 
context:   startup: function()  {    try {      var pbi = pref.QueryInterface(Components.interfaces.nsIPrefBranchInternal);      pbi.addObserver(this.domain, this, false);    } catch(ex) {      dump("Failed to observe prefs: " + ex + "\n");    }  },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/2e66280faef73e9be218e00758d4eb738395ac83/editor.js/buggy/editor/ui/composer/content/editor.js