Firefox Developer Edition is a special version of the Firefox web browser designed specifically for web developers. It includes advanced tools and features that help developers build, test, and debug websites more efficiently. This edition offers a user-friendly interface with access to experimental features and the latest updates. One of the key highlights of Firefox Developer Edition is its built-in Web Developer Tools, which provide functionalities like responsive design mode, CSS grid layout visualization, and JavaScript debugging. This version also supports various add-ons and extensions, making it a versatile choice for developers looking to enhance their workflow.