Works really well with Linux Rated 5 out of 5 stars

I'm using this add-on on Linux, and I can finally control Grooveshark using my media keys. Here's how I did, using the i3 window manager:

# Control Grooveshark
bindsym XF86AudioPlay exec curl http://localhost:8800/play
bindsym XF86AudioStop exec curl http://localhost:8800/stop
bindsym XF86AudioNext exec curl http://localhost:8800/next
bindsym XF86AudioPrev exec curl http://localhost:8800/previous

For other window managers, just add a global key binding that executes the "curl http://localhost:8800/{action}" command.

This review is for a previous version of the add-on (