>If you build a userbase out of power users

But they've never done this. There is a very vocal group of Firefox power users but the browser has always targeted a general audience, marginalization by Chrome over the years not withstanding.

If you have any ambition to regain some of that market share listening to the average vocal Hackernews or Reddit commenter, who is not the median user, even just among the current ~150 million users is not a good idea.