Google is out to get your passwords. >D
Anything has got to be better than Internet Explorer. Grrrrr.
The only problem I have with Firefox is the memory usage. I have loads of RAM, but it still takes up way more than all the other programs. O: And the occasional lag, because I have too many tabs open.

Otherwise though, I like Firefox the best at the moment, because of all those extremely useful add-ons and the extent of customisation you can do with it.