HTML5 <audio> textTrack.kind=subtitles cueChange event not working in FireFox

Question

UPDATE:

This issue no longer existing FireFox, cuechange now works. Embedded base64 images also render.

The original code is a simple implementation of am

Answer 1

Patches have now been added to mozilla-inbound to get these firing for media elements (it now works for video). I will now be fixing the audio side, which just doesn't fire because there's no subtitle window.

https://hg.mozilla.org/integration/mozilla-inbound/rev/8935a32269a5 https://hg.mozilla.org/integration/mozilla-inbound/rev/e1d06acdeb7b https://hg.mozilla.org/integration/mozilla-inbound/rev/9f4d815bb9af