Bugzilla

### Beta/Release Uplift Approval Request
* **User impact if declined**: Users using webrtc services may appear with video a few seconds behind audio, on the other participants' screen.
* **Is this code covered by automated tests?**: No
* **Has the fix been verified in Nightly?**: No
* **Needs manual test from QE?**: Yes
* **If yes, steps to reproduce**: See comment 0.
* **List of other uplifts needed**: None
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: This mainly shuffles some things on main thread around. The biggest risk is missing some event on the newly introduced MediaTrack that was only signaled on the old one, but I can't think of any more than the one (enabled/disabled) fixed in this patch.
* **String changes made/needed**:

### Beta/Release Uplift Approval Request
* **User impact if declined**: Users using webrtc services may appear with video a few seconds behind audio, on the other participants' screen.
* **Is this code covered by automated tests?**: No
* **Has the fix been verified in Nightly?**: No
* **Needs manual test from QE?**: Yes
* **If yes, steps to reproduce**: See comment 0. Any whereby room should work now as they've rolled the new interface out everywhere (no mozilla subdomain needed).
* **List of other uplifts needed**: None
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: This mainly shuffles some things on main thread around. The biggest risk is missing some event on the newly introduced MediaTrack that was only signaled on the old one, but I can't think of any more than the one (enabled/disabled) fixed in this patch.
* **String changes made/needed**: