word of warning about upgrading to Firefox 3.1 beta...
 

99% of your extensions won't work. I'm sure most developers have been using the same docs as me which recommend having the max version set as 3.0.*

Which means that unless developers are right on top of keeping their extensions up to date, they won't work with this update immediately.

Just a word of warning. :)

I can't live without the extensions... I waited around on FF 2 a little longer than I wanted to so this won't be a big deal.

I've always liked Firefox more than the rest as it is but really sells me is the huge number of extensions and the ease of being able to create new ones.

I know many people need their extensions to work so they had best keep this in mind when upgrading.