I used to use RequestPolicy too. Then I found uMatrix, which simply has a much better representation for this, and allows finer control (cookie/image/css/plugin

I used to use RequestPolicy too. Then I found uMatrix, which simply has a much better representation for this, and allows finer control (cookie/image/css/plugin/script/XHR/frame). I suggest you to try it out. As for the setup, I made it accept all first-party content, and images+css from third parties, and block everything else by default. Then you play the "guess the source" game for a couple of scripts that you as RequestPolicy user are already familiar with :)