I've tried Mozilla, but after a few days, I decided I just didn't like the "feel" of it. I was closing windows when I just wanted to close tabs, and found the whole thing too much of a bother to keep straight. I used Netscape Navigator for my first two years (97 and 98) on the Internet, then tried IE5, and liked it. I guess I still do, and if enough people start using alternative browsers, there will be popups written for them, too.
Mozilla sure looks like Netscape v7.1, but wo/ all the bells and whistles. Same authors?