Components.classes["@mozilla.org/preferences-service;1"] .getService(Components.interfaces.nsIPrefBranch2); this.settings ? this.settings.prefs : Components.classes["@mozilla.org/preferences-service;1"] .getService(Components.interfaces.nsIPrefBranch2); false document.getAnonymousElementByAttribute(this, "anonid", "input"); this.parentNode.localName == "settings" ? this.parentNode : null;