This extension allows you to scrobble what somebody else is scrobbling.
Are you having a good time listening to music with your friends but only one of you can scrobble the tracks to Last.fm? Not anymore. This extension copies scrobbles to your profile in real-time.
Facebook page: https://www.facebook.com/last.fm.party
Public source at GitHub: https://github.com/Onset/Last.fm-party
Please feel free to add any ideas or bug reports: https://github.com/Onset/Last.fm-party/issues
