Well, a bunch of FoLCs (myself included) like
FireFox . It's built off of the
Netscape platform (which is also free, BTW), but it's open source. That means that anyone with the proper know-how can contribute to it, adding new tools, fixing bugs, etc.
It's stable, spyware-resistant, and has a
ton of handy features.
Give it a try. I suggest browsing through the themes (skins) and extensions (add-on features), once you have it installed.
Paul