It is clearly not a fork. They follow upstream Chromium and then apply patches, as explained here: https://github.com/brave/brave-browser#update-brave https://g

It is clearly not a fork. They follow upstream Chromium and then apply patches, as explained here: https://github.com/brave/brave-browser#update-brave https://github.com/brave/brave-browser#update-brave. A fork diverges from a point and then doesn't rebase upstream after that. Eich is lying.