Playing a sound in a Firefox add-on

Question

I would like to create a simple add-on that would play a different MP3 recording every time the user double clicks a word in a webpage he is visiting and selects a special o

Answer 1

Here is a working code....

var sound = Components.classes["@mozilla.org/sound;1"].createInstance(Components.interfaces.nsISound); 
var soundUri = Components.classes['@mozilla.org/network/standard-url;1'].createInstance(Components.interfaces.nsIURI); 
soundUri.spec = "chrome://secchat/content/RING.WAV"; 
sound.play(soundUri);