Patch FireFox, Patch!
Maybe I'm stating the obvious here but I'll make the same complaint about FireFox that I've been making about Nero for years.
I want patches, not full blown installations posing as "upgrades". The upcoming FireFox 1.03 will continue to prove my annoyance. At least FireFox is small enough (for now) that it's not much of a problem. Nero has no escuse, especially now that they are pushing 30megs per "update".