People say that Firefox did the hard work, because back then the web was just entirely built for IE. It was much harder to steal market share from IE at that po

People say that Firefox did the hard work, because back then the web was just entirely built for IE. It was much harder to steal market share from IE at that point, because the web that you were able to display, if you were not IE, was just broken. You had to be so much better than IE at everything else to get people to use your browser despite the web being broken. The small differences between browsers today would not suffice for that. So, the total number of percentage points that Chrome ate up is bigger, but it would never have gotten off the ground, if Firefox had not shaved off market share beforehand.