Ironfox has been well received and will be added eventually, from what I skimmed.

https://discuss.privacyguides.net/t/ironfox-a-new-mull-fork/...

Librewolf has community support as you can see here.

https://discuss.privacyguides.net/t/librewolf-firefox-based-...

They don't do anti-recommendations on the pages but you can see the discussion for things on the forum.