Until then to hide the http-referrer, I put the Firefox variable network.http.sendRefererHeader (in about:config) to 0. But when I want to log in edX this site ask me for my referrer.
That’s why I want to select domains I want to allow to see my referrer. I find the Firefox extension Smart referrer but this one seems to be not work. When I activate it (with the variable network.http.sendRefererHeader in 2) all sites receive my http-referrer not only the ones on my white-list. And when I turnnetwork.http.sendRefererHeader into 0, any domain could receive my referrer. Then you see that this extension not working.
Is there a solution to select the domains allowed to receive referers?