This is a very neat concept. One problem I see is that having privacy pass installed instantly lowers your privacy, as it marks you as one of a small set of use

This is a very neat concept. One problem I see is that having privacy pass installed instantly lowers your privacy, as it marks you as one of a small set of users with that extension. Combine that with IP address, and you could potentially trace a user across the web. I wonder if there's any potential for tor to support the extension by default, which would prevent users from being punished for installing the extension manually.