Firefox

Pandora owns my heart when it comes to listening to music over the internet, but I allow myself certain infidelities from time to time. Mercora uses the power of Ajax in that effective manner that makes you wonder how pages managed to ever seem smooth before. The idea behind the site is interesting: the users are the DJs, the users are the listeners. Essentially it’s a peer-to-peer music-sharing service, but with streaming instead of torrenting, and legal listening instead of pirating. One perk over Pandora is that you can actually search out specific songs and play them on the spot. Instant gratification for your ears.