var yuipath = 'clientscript/yui';
var yuicombopath = '';
var remoteyui = false;
else // Load Rest of YUI remotely (where possible)
var yuipath = 'http://yui.yahooapis.com/2.9.0/build';
var yuicombopath = 'http://yui.yahooapis.com/combo';
var remoteyui = true;
Mozilla just opens the player (for local radio station 1070thefan) up for me in a different tab, not a popup window. The only plugin you would need is Flash, but I can't imagine you don't have flash installed, it's so ubiquitous .
You might check to see if you have the latest version of flash. Other than that, I don't know, unless some other plugin is interfering with it?