Been using FireFox for quite some time and I really like it-very fast. Have heard that it has been the browser picking up most of the slack ever since all of the holes in IE were exposed.
Versions available for PC, Mac and Linux- seems to be very stable. On a Mac I also use Opera (as it conforms tightly to W3C standards), Mozilla (same engine as FireFox) as well as OmniWeb occassionally.


-gruven