Evil Firefox Error — “A parameter or an operation is not supported by the underlying object”

Question

I\'m trying to figure out what is going on here. I\'ve been at it for hours now and can\'t seem to get a grip on why this is happening.

I\'m making a few AJAX calls, and

Answer 1

Yes, it is a CORS problem caused by using ajax. But as user320550 asks, what if you NEED to use the property 'async:false'? I found that using the 'withCredentials:false' property as a workaround fixes the issue on firefox and doesn't affect other browsers.