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
It's all about how far we can push the user and how much the user is willing to pay. Gotta squeeze and close all avenues of escape, so they tolerate some more.