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
This sounds like immature project drama. I’ve seen it before where there’s a large, professionally maintained product and people make forks to add small changes and then different forks start fighting with each other over because it’s their features and they don’t want other forks to incorporate them. You should probably just avoid Floorp if possible.