When Mozilla released the Firefox browser in 2004, Microsoft's Internet Explorer dominated the market with a whopping 95 percent share. Now Firefox has 18 percent of the market and Apple's Safari has another 6 percent. Along the way, Wall Streeters began pressing Mozilla to go public (it won't) and Mozilla CEO John Lilly wowed scores of suits with his talks about how the open source project became a successful business. Just before the launch of Firefox 3 in June, Wired sat down with Lilly at his company headquarters in Mountain View, California.