Shows information about artists. Integrates with Pandora or FoxyTunes to provide real-time information about currently playing songs. Scrobbles music listened to on Pandora or in FoxyTunes to your Last.fm account.
This is my entry for the Extend Firefox 3 contest, and may still be rough around the edges. Be gentle.
Watch this helpful video on installing and using Harmony: http://www.vimeo.com/1282974