See also https://forum.endeavouros.com/t/floorp-going-closed-source/52783
Edit: They claim they will make that part open source too, eventually, and it is due to behavior of another browser: https://github.com/Floorp-Projects/Floorp-core/issues/62
Edit 2: They just open sourced the private repository 7 minutes ago, 2024-03-24T12:39Z
Librewolf, their devs seem hella inactive but their builds are automated. Tbh I would prefer a working arkenfox more. Made my own softening and install script but its pre-alpha and I will likely rewrite it again in some time.