Firefox isn't based on WebKit. Maybe you're thinking Safari.
Ultimately you really only have KHTML (what Webkit was forked from), Gecko, Triton (IE classic), and I can't recall what the new (now dead) engine in IE11 was called. The rest are forks, mostly of Webkit/KHTML.
I guess there's Ladybird and Servo too, but they are a way still from being used as a daily driver.
I doubt that's what they meant since Safari currently uses WebKit. But yeah, maybe they meant how WebKit is a fork of KHTML and Chrome is a fork of WebKit.
Firefox isn't based on WebKit. Maybe you're thinking Safari.
Ultimately you really only have KHTML (what Webkit was forked from), Gecko, Triton (IE classic), and I can't recall what the new (now dead) engine in IE11 was called. The rest are forks, mostly of Webkit/KHTML.
I guess there's Ladybird and Servo too, but they are a way still from being used as a daily driver.
I doubt that's what they meant since Safari currently uses WebKit. But yeah, maybe they meant how WebKit is a fork of KHTML and Chrome is a fork of WebKit.