Synchronous GM_xmlhttpRequest acting asynchronously?
I'm trying to get a GM_xmlhttpRequest call to behave synchronously, but I can't get it to work like I expect: function myFunction (arg) { var a; GM_xmlhttpRequest ( { method: "GET", url: "http://example.com/sample/url", synchronous: true, onload: function (details) { a = details.responseText; } } ); return a; } b = myFunction (); alert (b); I never get anything back for b here; it's undefined. Is there some step that I'm missing here? I'm using v0.9.13 of Greasemonkey, and v9.0.1 of Firefox. Just stumbled upon this topic in Google. Synchronous GM_xmlhttpRequest RETURN the result instead of