Facebook on Tuesday announced that it was preparing a plugin to its popular Messenger platform that will allow a website's visitors to chat with a human or bot without leaving the location. Customer Chat is one of a number of changes in the version 2.2 update of Messenger platform revealed at the Web Summit in Lisbon, Portugal. The chat plugin will be available on desktop and mobile devices. Early testers include airlines like KLM, Volaris and Air France. Chatbots deployed through the plugin can perform a number of duties.