rem: unregister: function() { if (!this._branch) return; this._branch.removeOberver("", this); }, 
add: unregister : function() { var observerService = Components.classes["@mozilla.org/observer-service;1"]. getService(Components.interfaces.nsIObserverService);  observerService.removeObserver(this,"em-action-requested"); observerService.removeObserver(this,"quit-application-granted"); } 
context:     unregister: function()    {        if (!this._branch) return;        this._branch.removeOberver("", this);    },
meta: 3444	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/3444/7512a6f000a8b96fa09b2f865d521f584312673d/torbutton.js/clean/src/chrome/content/torbutton.js