Try an I'm Feeling Lucky for "Firefox." "A lot of people know Mozilla is non-profit," sure, but more people know that there is a browser called "Firefox" and don't give two craps about Mozilla or non-profit or open source or anything else. Surely there will be some fringe cases, but I bet most people who still go to "mozilla.org" for Firefox requests are die-hard old FF/Moz fans from before the .com site appeared, or developers. Most people will, I'd bet, just google Firefox or type in "firefox.com" and be correct.