Facebook Messenger is an instant messaging service and software application which provides text and voice communication. Integrated with

Facebook's web-based Chat feature and built on the open MQTT protocol,Messenger lets Facebook users chat with friends both on mobile and on the main website.

Facebook Messenger is an instant messenging app which was launched in August 9, 2011. It makes more easier to chat in mobile, Now Facebook has

launched its messenger for web browser you can have a look on this link https://www.messenger.com/ or https://www.facebook.com/about/messenger

and start chatting, calling and many more options.

Facebook reported in March 2015 that Facebook Messenger has reached 600 million users

Facebook Messenger for Web Browsers