When it comes to a browser, I'm curious as well. I often end up with 100+ tabs in firefox before I close them all. I don't think think I'd consider that being a power user, but would a 10x power user simply mean someone with over 1,000 tabs open?
I haven't used Chrome regularly in the last year or so, but it would get noticeably slow by the time I had 3-4 windows with 10-20 tabs each. Firefox hasn't really had that issue yet.
Years ago though, Chrome was noticeably faster than Firefox. That changed (IMO at least) at some point in the last few years.
I use Firefox day to day, but if I was a “power user” and picking apart web traffic everyday I’d probably use Chromium. The dev tools in it are way better than the ones built in Firefox.
I haven't used Chrome regularly in the last year or so, but it would get noticeably slow by the time I had 3-4 windows with 10-20 tabs each. Firefox hasn't really had that issue yet.
Years ago though, Chrome was noticeably faster than Firefox. That changed (IMO at least) at some point in the last few years.