==Address leakage and VPNs==
===Undocumented===
A lot has yet to be documented, and a lot has been and has yet to be implemented.
In the vacuum, prefs like media.peerconnection.ice.proxy_only_if_behind_proxy are getting 'documented' like [https://www.reddit.com/r/firefox/comments/8hjh3h/google_voice_psa_if_you_have_been_recently_having/ this].
===Test===
* a [https://diafygi.github.io/webrtc-ips/ test for WebRTC leaks] (partial?)
===Prefs that control ICE Candidate generation===