Please don't get me wrong, I was just looking for confirmation of the same error. I love Firefox. Even I never switch to Chrome for common office work.
I know microsoft will stop supporting XP, but hopefully Mozlla don't [1].
Unfortunately, in some third world companies (like where I work), IT guys prefer not to change what works until it is absolutely necessary.
http://www.microsoft.com/en-us/windows/enterprise/endofsuppo...