Well, FF+FB ruled supreme back when there were no decent alternatives, particularly on Windows - which was a very popular platform back then. We're talking pre

Well, FF+FB ruled supreme back when there were no decent alternatives, particularly on Windows - which was a very popular platform back then. We're talking pre-2008, which is before smartphones, most people were browsing on Windows, and the only real alternative to MSIE on Windows was... Firefox. Of course, it's great that Firefox was there, and that Firebug was developed, and it probably did contribute to the fact Chrome Dev tools are so good.