If a MediaStreamTrack is live when navigating away from the page, what should happen? Some possibilities (based on my very limited knowledge of MediaStreamTrack).

1. page is not salvageable (cannot enter BFCache)
2. page is salvageable (can enter BFCache)
   1. track becomes ended, event is delivered to JS
   2. track stays live. If the page is restored, things continue on as before

Are there other options? I would very much prefer to no do 1.

@alvestrand @guidou please add people from Moz and Safari if possible.