4 ms·

uMatrix / uBlock seems to do what you want.

• eterm 8y ago
  uMatrix looks like the kind of tool I was thinking of, thanks. I just wish I didn't have to give an addon permission to: Access your data for all websites Clear recent browsing history, cookies, and related data Read and modify privacy settings Access browser tabs Access browser activity during navigation But that's just the very broken permissions model that addons currently have so thank you.
• btrettel 8y ago
  RequestPolicy is another addon which does this, but it doesn't work on the latest Firefox.