You can also set this directly in about:config under network.http.sendRefererHeader: 0 = never send the header 1 = send the header only when clicking on li

You can also set this directly in about:config under network.http.sendRefererHeader: 0 = never send the header 1 = send the header only when clicking on links and similar elements 2 = (default) send on all requests (e.g. images, links, etc.) If you want more granular control (like sending referrers but only the root of the domain) all of the various network.http.referer flags for Firefox are listed here: https://wiki.mozilla.org/Security/Referrer https://wiki.mozilla.org/Security/Referrer Doesn't have a few of the features that your extension has, but it's done the trick for me!