Save: function (links)
        {

                // download from: aURLToDownload
                var downloadURI = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService).newURI(links, null, null);

                // download destination
                var outputFile = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile); 
                outputFile.initWithPath("c:\\temp\\1.pdf");

                var persist = Cc["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"].createInstance(Ci.nsIWebBrowserPersist);


                persist.saveURI(downloadURI, null, null, null, "", outputFile);
        }