A quick check with wireshark reveals the use of a VBR codec for audio, so there's another probable side channel besides the Javascript related issues already di

A quick check with wireshark reveals the use of a VBR codec for audio, so there's another probable side channel besides the Javascript related issues already discussed. I don't know much about WebRTC, but I think it's something you can set and Subrosa should be doing so in app-webrtc.js.