Under the hood: Facebook Messenger for Firefox

What this post added

This post details the integration of Facebook Messenger into Firefox 17, leveraging HTML5 WebSockets for persistent client-server connections and MQTT for efficient, low-bandwidth communication. It also describes the use of HTML5 Shared Workers to centralize data fetching and synchronize state across different Facebook UI elements within the browser, overcoming challenges of reusing DOM-dependent JavaScript libraries within a DOM-less worker context.