Blocking shadow-root?

[grishka]

Prerequisites

• I verified that this is not a filter issue
  • Filter issues MUST be reported at filter issue tracker
• This is not a support issue or a question
  • Support issues and questions are handled at /r/uBlockOrigin
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue
  • Your issue may already be reported.
• I tried to reproduce the issue when...
  • uBlock Origin is the only extension
  • uBlock Origin with default lists/settings
  • using a new, unmodified browser profile
• I am running the latest version of uBlock Origin
• I checked the documentation to understand that the issue I report is not a normal behavior

Description

Yandex uses this #shadow-root thing on a number of its projects (at least zen.yandex.ru and pogoda.yandex.ru) to circumvent ad blockers. There aren't any CSS selectors I could reliably use to hide this block without hiding anything else. Procedural filters (something:has(something)) don't work inside the shadow root — I tried div:has(style) and it didn't match anything even though there is such a div inside the shadow root.

Also, I don't think I've ever seen shadow-root being used for non-nefarious purposes. Is there a filter rule to block this browser functionality, either for a domain or completely, using uBlock Origin?

A specific URL where the issue occurs

https://zen.yandex.ru/media/zemexpert/skk-peterburgskii-jertva-gradostroitelnogo-proizvola-v-sanktpeterburge-5e36f42a5098d322f9ed26b0

Steps to Reproduce

1. Try blocking ads on zen.yandex.ru
2. Realize it's this shadow-root thing

Expected behavior:

I'm able to hide the shadow-root node entirely or at least apply procedural filters within it

Actual behavior:

I'm powerless, and the only thing that sorta helps against this is the nuclear option of disabling JavaScript.

Your environment

• uBlock Origin version: 1.24.2
• Browser Name and version: Vivaldi 2.10.1745.27
• Operating System and version: Mac OS 10.14.6

[uBlock-user]

Duplicate of #803