In fact, GNOME’s default browser uses WebKit
WebKit, or WebKit2? Last I checked, which was a year or so after WebKit was transitioned to a multi-process architecture, smaller FOSS browsers were stuck with the older single-process WebKit.
That must have changed since then, but if not, I can’t imagine a forked single-process WebKit has successfully kept up with new web features introduced since.
No, yeah. We both agree here. Zero obligation for a company to help it’s competition, and the likely reason they would ever do it is either to profit or avoid regulatory scrutiny.