https://qutebrowser.org/ and Librewolf
https://qutebrowser.org/ and Librewolf
Have they considered just asking for money? Also getting rid of the giant holes that they keep pouring their money into?
A lot of people love Firefox, and would happily donate. They could also trim a lot of fat at Mozilla quite easily.
You can, but the last time I did that the instructions were incomplete, and you still had to auth through Mozilla. That was a few years ago, so things might have changed since then.
Install Ganeti, or K3s, and do a lot of things!