Earlier quoted context omitted.
Do people think Firefox doesn't work? I've noticed zero difference between using Firefox and Chrome and I've used both daily for five years or so.
Google has an incredible walled garden of apps and things that 'just' work together seamlessly. I remember switching from FF to Chrome years ago as Chrome was measurably faster. The staying power was using Google's entire suite of apps with Chrome. Things like copying and pasting without formatting or searching for strings all contribute to stickiness.
Using chrome once it loads with everything else shutdown seems fast.
Firefox is overall faster because of those issues. But firefox will use too much memory and kill itself in time. But has gotten better at killing itself without killing everything else.