[squarefoot]

"It is impossible to fork Firefox and survive"

Pale Moon did this a while ago and is still around, although in need of donations as many other volunteer-driven projects. https://www.palemoon.org/

[AsyncAwait]

Pale Moon would sink in a week if Mozilla closes, it does not have the resources to implement or influence new standards.

[squarefoot]

That wasn't a Mozilla vs Pale Moon contest, anyway if Mozilla would close Pale Moon would likely inherit at least part of its developers and user base. Surviving economically however would be a totally different beast.

[digi_owl]

And Mozilla has?!

[AsyncAwait]

Certainly more so than Pale Moon.