I don't know if you can bypass that old version warning; there might be a way.

But I want to know why your Firefox is reporting itself as version 20. Is that also because you are not allowed to update Firefox either? Maybe you can pass along to your administration that Firefox 20 is not secure; Mozilla discloses security flaws after each new release.

Yeah, the computer administration here is total crap, so I'm not surprised that we're running an older, unstable version of Firefox. As a student, they don't really pay attention to us when we say we need computer updates unless we really hound them.

If anyone knows a way to do this through firefox, I'd be ecstatic, otherwise I'll have to whittle down our IT department until they send someone to fix it.