Embedding HTML5 audio

sorry – missed your post. I am not sure if I can help here – there are some issues with embedding code like youtube in firefox (the git ticket you created at https://github.com/Leaflet/Leaflet/issues/999 has been reopened). Hope that this will help making some progress on this as well as the open bug with firefox (https://bugzilla.mozilla.org/show_bug.cgi?id=811547)
best,
Robert