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 cant believe people still use chrome.
It's worse than that. Because Chrome is used by nearly everyone and it sometimes takes extra work to get a site compatible with Firefox after it's been developed using Chrome, there are lazy web devs out there trying to drop support for Firefox altogether. Unite everyone under a single monopoly.