HTML5 audio not working on Firefox

Question

Works fine on Chrome. Moreover, I'm using an ogg file so that's not the problem. I'm running on the latest version 9.0.1. HTML5 audio is supposed to be supported by both Chrome and Firefox.

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

Answer 1

The solution is to properly convert the ogg file into mp3 or vice versa. The encoding was wrong when I just renamed the .ogg file to mp3, silly me. I used software called "Audacity" and "Switch" to accomplish this.