Firefox 3 and extensions

I just installed a Firefox 3 (rc3) (just 2 days before the big download day) in a virtual box to check how my extensions would be working after an upgrade.

The results are now in, and they are quite a disaster:

Only del.icio.us and greasemonkey continue to work...

Apart from that FF3 seems to work perfectly.
I already got used to and love the new autocomplete feature in the addressbar...