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
I have a choice of not using these sites nor enabling antifeatures like DRM support in Firefox now or likely its libre future forks.
Sticking to free/libre has been good to me in the last 30 years. I don’t intend to change that.