So.. Chrome is too big to fork. Then why don't we make a bare-bones OSS no-DRM browser with only a subset of JS and CSS and promote at the same time an old-school webring of 'virtous' websites.
If it catches on (and it could since it'd be free and fast), maybe some big sites would evolve to advertise themselves as 'virtous'.
Something like Ladybird? https://github.com/SerenityOS/ladybird
I think it wants to implement all of JS eventually though.