I think a lot of it comes down to mindshare. Firefox has does some advertisement but what to we call it when we "search the internet"? We "google" something. Go

I think a lot of it comes down to mindshare. Firefox has does some advertisement but what to we call it when we "search the internet"? We "google" something. Google has so much mindshare and they exploit that to push their browser. What is popular is often what is known and available, hardly what is best. IE is only not popular because it was so bad for so long.