"But it's supplied with Windows, and you can't get rid of it, and they're making money off of the operating system so in a way it's commercial." First of all, if you don't use it, it doesn't take up resource. So people do have the choice. Second, many ISPs (e.g. Bell Sympatico) do supply multiple browsers as part of their installation software. So it's not like people don't have a choice. Third, if that is the case, why doesn't FF go ahead and build a whole OS around the browser to compete? If MS has laid out the rules of the game like that, then FF should if they're smart be playing along.