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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.


  • 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.

    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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