[Yizahi]

Fork term is too vague as to become almost meaningless. Technically cloning software and changing a single letter anywhere is "a fork". It's just pointless for endusers.

So going by a letter of definition Chrome Brave is a fork, but by spirit of a definition it is not. Example - this topic right here. If it was a fork they would have forked the code and maintained Manifest V2 instead of V3, autonomously, like software forks do. But since it is not a real fork (in spirit of the word), they can't and don't want to do it, and simply accept every change the real code owner does, Google in this case.