Years ago together with another guy I created LibreFox. I came up withe the original concept that is still used (No telemetry, private search, uBlock Origin by default, default security and privacy settings).

We quickly heard from Mozilla's lawyers: "Eliminate the Fox from your name or we sue you!".

So we abandoned the project, but seeing the website you posted, my concept has lived on, and the gitlab seems to be pretty active as well!