It is not working at all for me either and I wanted this SO bad. I suspect that using https or do not track may have something to do with it working for some and not others. I have Win10, FF51 - not e10s enabled. I tried disabling my https add-on but apparently I have something else that is automatically setting https so I can't test that theory until I find it. Perhaps ad-blocking could be interfering too. I think those of us it is not working for have some kind of setting or security add-on that is blocking it from working. Three stars until I figure this out.