In order to prevent your browser from leaking DNS one has to disable WebRTC https://trisquel.info/en/wiki/tweak-your-browser-enhance-security-and-privacy in about : config
media.peerconnection.turn.disable=true media.peerconnection.use_document_iceservers = false media.peerconnection.video.enabled = false media.peerconnection.identity.timeout = 1
