Hi,

I dunno. I get "Can't generate fingerprint - 2004" and I assume you do too.

The workaround is to open the audio element in its own tab. You can do this easily with an addon. Then it works as expected.

This should help with opening:
https://addons.mozilla.org/en-US/firefox/addon/list-and-open-media/

I'll try fixing it in the future, though. Bit too busy now.