For future reference, here’s a list of what I’ve used as my primary web browser since I first discovered “Mosaic” in 1994 (or rather, since I first got direct Internet access and not a shell account with Lynx).
On Windows: Netscape → Opera → Mozilla → Firefox
On Linux: Netscape → Mozilla → Galeon → Firefox
On Mac: Safari*
*I’ve only been using a Mac regularly for about a year. Before that I only occasionally used them in computer labs at school.