rem: ProxySandBox.myIP = dns.myIPAddress; 
add: try { ProxySandBox.myIP = dns.myIPAddress; } catch (e) {   ProxySandBox.myIP = "127.0.0.1"; } 
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);        ProxySandBox.myIP = dns.myIPAddress;        LocalFindProxyForURL=ProxySandBox.FindProxyForURL;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/af1c35ac010345e456c7a10573826968739d0bf8/nsProxyAutoConfig.js/clean/netwerk/base/src/nsProxyAutoConfig.js