Winamp supported extensions noted in web browser

[matthewk]

I am rebuilding winamp 2.91 setup via adminstudio. I noticed that the supported extensions mp3, wav, etc. are noted in registry by the setup for netscape web browser. If my understanding of this is right, I wanted to be able to do this for Opera, Firefox and IE (if such is same setup there too). Here is a screenshot where AdminStudio noticed the registry change with netscape entries. I laughed when I saw netscape navigator. Maybe someone can help me with this for opera and ff. Thanks in advance