I started to download Firefox from Mozilla. But just because I have not decided yet what distro to use for family computers. Archlinux is fine for me, but not suitable for everyone.
It depends on what is meant by "family computer" but don't underestimate the usefulness of a cheap chromebook as well. My wife uses hers exclusively, since using the internet is pretty much the only thing she actually uses a computer for.
In what way? For any desktop usage Ubuntu is suitable for, Pop_OS can do it.
Myself I used to buy these little Atoms with eMMC running Windows S. E.g. HP used to have good hardware in that class. Now Windows S has been discontinued and I don't see much choice in the class anymore. Maybe Acer sometimes, but I have zero experience with them.
For Chromebooks there is GalliumOS, but it looks very silent. Not sure whether it is still alive. Last supported model is from 2019.
I was using ubuntu a lot years ago but have now settled on Debian. No annoying crap like this happens there, apt is all i need!
Make sure to pin it and/or neutralize snap so it takes precedence.
I guess it's unlucky that they call the package firefox. Calling it something unique would make pinning unnecessary and popcon results correct.