Question

Is there any way that HTML Audio tag could play mp3 in Firefox.

Answer 1

FF currently supports only ogg formats, so you’ve to include a copy with ogg format as well:

<audio controls="controls"> 
    <source src="music.ogg" type="audio/ogg" />
    <source src="music.mp3" type="audio/mpeg" />
    Your browser does not support the audio element.
</audio>

And for sake, use old object tag for embedding you mp3 file as follows:

<object data="music.mp3" type="application/x-mplayer2" width="xxx" height="xxx">
    <param name="filename" value="music.mp3">
</object>

or use embed as:

<embed type="application/x-mplayer2" src="music.mp3" height="xxx" width="xxx" >