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 don’t disagree with you on alternatives but again it’s challenging for the technical folks amongst our peer groups to help adoption of an alternative if we can’t provide places for the folks we support to download the alternative and try it
There’s no way for any of my family or friends to understand how to build their own browser, let alone setup a WSL2 environment to make it work. Their eyes are going to glaze over at the thought then they’re going to go download something else.
That time is not yet. Give it a few years and if you're willing, join the project to help. There is movement, it's just about how can we help.