I'm writing a user script to take an image from a page, and upload it to a server. The script works fine in FF (Greasemonkey and Scriptish), but when I use Chrome (using Tampermonkey or Ninjakit), ...

I get a ReferenceError in the following userscript code: // ==UserScript== // @name ... // @namespace ... // @description ... // @include ... // @grant GM_xmlhttpRequest // ==/UserScript== consol...