I've been using Mozilla Firebird for a couple of months now and find it crashes about 20 times less than IE - not that I've been counting but I have only cursed at it a few times now.

The only think that did piss me off was upgrading to 0.7 - it didn't load with my old profile and I had to recreate it. Bookmarks and cookies moved over fine but the password manager file didn't and I couldn't find a way to make it work.

I have a nice "userChrome" file which blocks banner ads etc. quite nicely, except it also blocked Google AdWords which I quite like (and indeed have spent £70k with so far this year), so I removed it.

Gareth