If a browser bans ad-blockers and people start to fiddle with DNS, wouldn't it be easy for a browser to use it's own DNS system? If a browser turns hostile there is nothing you can do.
"... there is nothing you can do."
I am typing this comment through a text-only browser. HTTP requests, with a bare minimum of HTTP headers, are being sent from a proxy I control, not the browser. Yet the comment looks no different than any other comment. It works. I have freedom to choose whatever software I want to make HTTP requests.
I try to avoid any software (not just browsers) that access the internet and bypasses the system DNS settings. The word "hostile" is a good choice of words I think to describe such programs.
Hopefully https://gioui.org/ quickly fixes that.
I mean, sure there is, some form of DRM is possible. It might be circumventable, but it would be a PITA.