Yes but all of these depend on the development team at Firefox. I don’t know what the solution is, but I do know that those three browsers would not continue if Firefox didn’t also continue. There’s still a lot of development work from Firefox.
At this point I think the safer route would be to just accept the Chromium hegemony and build a free browser from that.
Waterfox, Ironfox, Librewolf
Zen?
Floorp
Netscape Navigator 4
Yes but all of these depend on the development team at Firefox. I don’t know what the solution is, but I do know that those three browsers would not continue if Firefox didn’t also continue. There’s still a lot of development work from Firefox.
At this point I think the safer route would be to just accept the Chromium hegemony and build a free browser from that.
Firefox still at least have a far far far more permissive OSS license than Chromium, so I’d say stick with that