3 things -

one, we don't run Unreal, it is not stable at our size, thus no +T and its not "disabled".

two, don't follow links from people you don't trust or to places that don't seem legit.

three, firefox should update immediately upon run, or at least notify you of a avalible update. Assuming they are getting your firefox version because of the chatzilla addon, you should have gotten the update to fix the flaw on launch.