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+Nightmare mode is when you block everything, except the main document. All secondary resources are blocked. As a result, most sites are broken. I personally advise against using this mode, since there is no real advantage from the [hard mode](https://github.com/gorhill/uBlock/wiki/Block-mode:-hard-mode). If you want to use uBlock Origin in this mode, you are probably better off using uMatrix or Policeman, which will give you a higher granular control over network requests than what uBlock allows you.
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+[TO COMPLETE]
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