Google Chrome Extension which controls music playback on popular online music sites such as GrooveShark and Rdio.   This extension requires an application, a MediaKeys Server,  to function: install the application before proceeding with the installation of the Chrome extension.

Usage

• Install the media-keys server application
• Install the extension
• Click the extension's icon to configure it

Features

• Control playback through the PC's Media-Keys
  
• Integration with GrooveShark
• Integration with Rdio
• Remote player control through PubNub  (you must have an account)