I am very new to linux and all the open source stuff (my first post on lemmy actually) so I don't get how this stuff works but flathub is saying that floorp is proprietary. But after a quick google search it says that floorp is open source licensed under MPL 2.0
To be clear, it used to be fully free software, then became proprietary for a little while, and then as of 17 June 2024 it became free again. So the most recent release 11.15.0 (from two days ago) is fully free, but the previous one isn't.