Comment by viraptor

It's mostly marketing. Google spent lots of money both for external marketing and for Google-property banners that advertise Chrome. There were years you basically couldn't visit a popular website without being told to install Chrome. Then there were billboards and paper ads on top of that.

There were feature differences for sure, but the marketing did a massive amount of work in this case. If people switched for features, all that spending for years wouldn't be necessary.