yes, and yes. You can download it, even with the Genuine Auth stuff, using
firefox.
It has a bunch of IE specific hooks in it, and doesn't have those hooks for
Firefox. You might keep an eye on Sunbelt's Counterspy product--did I hear
they were going to add firefox hooks??
However, even without the browser specific hooks--I think the real-time
protection, as well as scanning and removal--add significant value.