Desktop Messenger for WhatsApp for Chrome
More About Desktop Messenger for WhatsApp
Important Note: Desktop Messenger for WhatsApp™ does NOT belong or related to the official WhatsApp application at all. It is basically an unofficial extension that is developed and maintained independently. The official WhatsApp software is only released for smart phones and web. This unofficial extension is a wrapper to the original WhatsApp and tries to make it usable as a browser extension.
Some important features:
1. A comprehensive WhatsApp client right in your browser's toolbar popup UI.
2. Notifies you (via badge icon text) every time something happens on WhatsApp within the people in your chat list.
Note: in order to report Bugs, please use the addon's homepage and fill the Bug report form: http://mybrowseraddon.com/whatsapp-desktop.html