Ajax won't get past readyState 1, why?

Question

I\'m trying to get this function to work, which does a request for parameter url then sends the responseText to callback which is a function.

Answer 1

I had the same problem on FireFox but not on Chrome.

The problem was my response had the mime-type set to "application/octet-stream".

Changing it to "text/html" made it work on FireFox too.