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
It may be. The person saying that has contributed artwork but is not the maintainer. It is a bad look though. It sounds like they want to build the next release in secret so the fork can’t release features first.