Firefox Developer Edition
Firefox Developer Edition is a web browser developed by Mozilla, featuring built-in developer tools tailored for web engineering. It includes a page inspector, JavaScript debugger, network monitor, storage panel, style editor, and performance profiling tools. The browser provides specialized features such as CSS grid visualization, inactive CSS detection, font inspection, and a responsive design mode to test layouts across different viewports. It supports remote debugging and multi-line console editing for web development workflows.
Checked on Sep 30, 2026.
Alternative resources
Responsively App
A developer tool that displays web pages across multiple devices simultaneously for responsive testing and layout verification.
Vue DevTools
Browser extension and standalone app for inspecting Vue.js component trees, states, and relationships.
Web Developer
A browser extension that adds a comprehensive toolbar of web development tools to Chrome, Edge, Firefox, and Opera.