It might be worth waiting a bit if you use addons. I imagine that it will take some time before they are updated.
I checked out the addons which I use, and they're all compatible with FF5, so I've upgraded (the Linux version of course) and all seems to be well.
(I think you meant "move up to FF5" )
HiLoss of Google toolbar a bit inconvenient,but have set home page to Google so its always available in the firs tabRegards Jeff