Can't get it to work on Firefox due to it trying to load jQuery from code.jquery.com where the CORS-policy disallows it. Specifically:
> Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://code.jquery.com/jquery-1.12.4.min.js. (Reason: CORS header 'Access-Control-Allow-Origin' missing).
> Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://code.jquery.com/jquery-1.12.4.min.js. (Reason: CORS header 'Access-Control-Allow-Origin' missing).