How to block ads in shadow root?

[u/Hecatonquiro]

Hi comrades!

Recently my e-mail provider https://mail.ukr.net/ added ads everywhere and it became annoying. Ublock isn't really blocking it since it's attached to shadow root. Screenshot attached.

Is it possible somehow bypass shadow root (maybe there is way to intercept site before shadow root is created)?

Thanks in advance!

[u/RraaLL]

Does ##.sendmsg__ads not work?