All, We're hoping to ship the MediaSource Extension API[1] soon. This is a new API on HTML5 media elements (<video> and <audio>) for feeding compressed audio and video data from javascript, allowing page authors to manage buffering, switch bitrates, splice clips, and so one while still taking advantage of the browser for decoding, sync and display.
In particular, we want to ship as soon as possible for YouTube, which will let us move a large number of users away from Flash video players. Until we have a complete implementation of the API, this feature will only exposed to YouTube domains in beta and release builds. We hoped to ship this for Windows-only in Firefox 36, but hit too many issues during the beta period. For Firefox 37 we're intending to land code[2] which appends the build id to the user agent string we send to the youtube.com and youtube-nocookie.com domains. This will let us compare crash statistics with our colleagues at YouTube and confirm fixes are working on both sides. This code is only active for non-release channels (i.e. Beta, Aurora/Developer, and Nightly builds) and only when the MSE api is enabled. We will remove the user agent change once MSE is in release. We hope this will be in Firefox 37 but it may slip again to Firefox 38.[3] -r [1] https://w3c.github.io/media-source/ [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1127448 User Agent bug [3] https://bugzilla.mozilla.org/show_bug.cgi?id=778617 MSE tracking bug _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
