Can't style elements in Shadow Dom

I want to style one element but it looks like it is injected into shadow dom.

Is there any way I can style it, Or is it a dead end?
I am trying to style "Magic Actions for YouTube" chrome extension.

Comments

  • edited May 2018 Firefox
    You can't style other extensions by using an extension. That's beyond the access privileges of an extension. No matter if chrome or firefox.

    /edit
    Though it should be possible to style html that is inserted to a page by another extension.
  • Filter would possibly affect nodes created by extensions or js.
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