It is not implemented, and ad blocking still works. Also they recently announced...

		mda on June 13, 2019 \| parent \| context \| favorite \| on: Chrome 76 Beta: dark mode, payments, new PWA featu... It is not implemented, and ad blocking still works. Also they recently announced more changes to the proposal. To be fair they have some good reasons to change existing api. World is not ending yet.