looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
and also some github docs
Internet Explorer tried real hard to do that. Pages were literally built only to run "properly" in IE.
Curious what round 2 would look like.
In a world that now has stronger cryptography, attestation and surveillance capabilities? I can assure you Round 2 would go vastly different. There would also not be a Round 3.