add: this.done = true; 
context:     onStopRequest: function(request, ctxt, status, errorMsg) {        this.done = true;        if(!ProxySandBox) {           ProxySandBox = new Sandbox();        }        // add predefined functions to pac        var mypac = pacUtils + pac;        // evaluate loded js file        evalInSandbox(mypac, ProxySandBox, pacURL);        try {            ProxySandBox.myIP = dns.myIPAddress;        } catch (e) {            // Well, theres nothing better.            // see bugs 80363 and 92516.            ProxySandBox.myIP = "127.0.0.1";        }        ProxySandBox.dnsResolve = dnsResolve;        LocalFindProxyForURL=ProxySandBox.FindProxyForURL;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/c95cf54bdc9d9e5c43b29be967d89e72c6908c92/nsProxyAutoConfig.js/buggy/netwerk/base/src/nsProxyAutoConfig.js