I’ve recently moved to Firefox 3 on my MacBook Pro. The first thing I noticed was pretty much all of my Firefox plugins stopped working. This didn’t really bother me until I started developing on the laptop. The two things I really missed were Web Developer and FireBug.
After a little bit of googling, I was able to find other people with the same problem and fixes. While these are not official releases, they seem to be working just fine for me.
Check them out below: