What an amazing add-in for FireFox. FoxyTunes allows you to place your favorite audio player right in your browser. It downloads album art and supports almost any audio player you can think of (WMP, iTunes, WinAmp, Musicmatch) . It is a really neat extension and I recommend it whole heartedly. Check out the FireFox Add-Ons page for more great extensions.
And listen to good music while you’re at it.