No, BGSound won't work in FireFox. It's not a standard's complient tag and is just implementing in IE. If you want the sound to work in most browsers, use the embed tag (or the object tag)
Code:
<embed src="something.wav" autostart="true" width="144" height="60"/>
More info here
And I agree - sound on websites can be annoying. But for a kids school project, we'll let this slide

What's really annoying is though smiley adverts you see where you pass your mouse over it and it screams "Helloooo" in a stupid way. Those I hate. Anyway, that's for another topic
