Mocking Bird is a Chrome Extension that generates a replay email based on the received email. It adds a 'Go' button in the reply box for convenient access. The user can describe the key points for generation in the reply box and then click the 'Go' button to instantly generate a replay email based on their specifications. This extension offers an easy and efficient way to handle email communication. It works for Gmail only for now. We are working hard to support more email clients.