ATTENTION!
This addon does not work right!
After discovering the same results when I had Disable WebRTCby Chris Antaki installed on my Waterfox, I installed THIS addon, restarted browser and the same result from www.dnsleaktest.com's "extended" test showed my true ip address!
This was AFTER the results at THIS addon's own test at https://ip8.com/webrtc-test showed no leaks.
Lies!
Not that I'm very happy with my current softether vpn, as well right now!
I am so disappointed!