Hey buddies here we go.. Official Facebook Messenger for Google Chrome/Pc is available on Google Chrome Web Store.

1.Facebook Messenger As A Google Chrome Extension:

Facebook Messenger from within your browser.
It allows you to open your Facebook mailbox to send and receive messages.
Not only for mobile phones. Now you can use Facebook Messenger from Google Chrome!
It’s an amazing way to get in touch with your contacts without wasting time.
Facebook Messenger is easy to use and it’s the best solution for any Facebook user.

2.Facebook Messenger As a Website:

Visit www.messenger.com to chat online as on messenger as a Website.Here is the screenshot of Messenger Website
Screen Shot: