Support Firefox 5.0.
|Reported by:||mikeperry||Owned by:||mikeperry|
Torbutton 1.4.0 should claim to be Firefox 5.0, as it looks like that is what we'll be using in TBB 2.2.x.
We should also perform some basic tests of FF5.0 compatibility. The set of changes on https://developer.mozilla.org/en/Firefox_5_for_developers looks small enough that it might just work.