If my first 20 minutes of Firefox 3 beta 2 usage are any indication it’s much faster than 18.104.22.168. That said, I won’t be switching until a number of my Firefox addins are supported. Anyway, one thing is for sure and that’s that my blog loads significantly faster.
If you haven’t had a peek it might be work a look. It doesn’t appear to mess with your existing 2.0 install so it (seems) safe though I haven’t tried uninstalling yet.
Btw, Merry Christmas!