When an audio element has been loaded by js "myaudio.load()" in firefox for android, it does not fire canplaythrough event

When an audio element has been loaded by js "myaudio.load()" in firefox for android, it does not fire canplaythrough event., but it has truely been loaded. Because you can play it and hear the sound. It works fine in desktop. When an audio element is loaded, which can fire the canplaythrough event.

here is the test example:

http://ift.tt/17kxktV

please see the log