Looking at the StatCounter Aug 2020 stats [1], ignoring browsers less than 2% usage share (because I'm lazy), it looks like:
Chromium based = 74.53%. Safari = 16.82%. Firefox = 4.09% (but effectively 0 on mobile).
And that's with Apple forcing WebKit on Apple mobile devices.
Throwing Firefox's 4% into WebKit could be like strategic voting to strengthen the opposition, stop splitting the vote, and reduce Mozilla's cost of maintaining FF (keeping their recent layoffs in mind).
[1]: https://en.wikipedia.org/wiki/Usage_share_of_web_browsers#Su...
That's a fair point. I very much value FF's extensibility.
Of course not. If all browsers effectively turn into slightly different UIs for WebKit, that is zero diversity.
My suggestion is in terms of "strategic voting" [1].