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

Thanks for answer from avaunt! I think there is a typo in initial code. When I tested it both in FireFox and IE, it didn't work.

The line in question is

a = v[i].activeCues;

and it should read

a = t[i].activeCues;

since activeCues is a property of the textTracks object, not video object. After this change, it works!

I tried to make this post as a reply to his post, but system did not let me. So adding it as an answer.