At that point the forks will become its own thing and depart from Firefox.
Which is ironically and exactly how Firefox came to be.
Netscape fucked up Navigator, some folks forked Navigator and created Phoenix - which then was renamed to Firebird, then Firefox. And somewhere in that timeline the Mozilla foundation ditched Navigator in favor of the fork.
Average Linux user > average windows user.
Plus Linux doesn't track you (depending on distro, I suppose.)
But I kid. People should use whatever the fuck they want.