I've been using Firefox for 3 months now, prior to that I was using the normal Mozilla suite.
I agree re: allowing more than 30 connections, this could well be bad for sites with slow servers, effectively locking other people out. The only other thing I have to add is that if you use firefox, for pity's sake back up your bookmarks file if you use bookmarks. On infrequent occasions, especially if it crashes, it may eat your bookmarks. The simplest way to do this is to copy the file bookmarks.htm from your mozilla folder to my documents, and if it does eat them, shut it down and copy it back:-)
By default in windows 2000 and XP it's in c:\documents and settings\[your username]\application data\mozilla\firefox\profiles\[random number]\
