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
www.getfirefox.com
Unfortunately they will also have to adapt to this. Or some popular websites will stop working and most common users won't care and leave firefox.
Giving into this billionaire blackmail won't help. We have to come together and crush google.