User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:37.0) Gecko/20100101 Firefox/37.0 Build ID: 20150328223854 Steps to reproduce: Visit www.videomail.io with the latest Firefox version 37 for Ubuntu and see, the webcam video feed is not turning up. It worked fine for older versions and works fine for Chrome. Actual results: After some debugging I found out that the loadedmetadata event is not fired for the video element once source has been assigned. Expected results: It should fire the loadedmetadata event so that I can call play() on it.

PS: it's similar to https://bugzilla.mozilla.org/show_bug.cgi?id=1149494

According to documentation in https://developer.mozilla.org/en-US/docs/Web/API/Navigator/getUserMedia the onloadedmetadata must be called. This leads me to the assumption that you do not have any unit tests coverage for that. Please add this to your unit tests as well. Thanks heaps!

[Tracking Requested - why for this release]: [Tracking Requested - why for this release]: [Tracking Requested - why for this release]: [Tracking Requested - why for this release]: Regression since Firefox37, but it is worth to fin for next esr38. Regression pushlog: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=e329c7fe4c4e&tochange=654e15b4dc9b Regressed by: Bug 879717

Tracking in bug 1149494.