Open-source browser with best-in-class developer tools.
Firefox is Mozilla's open-source web browser available for Windows, Mac, Linux, iOS, and Android, built on the Gecko rendering engine independently of Google's Chromium project. Its developer tools include a CSS Grid and Flexbox inspector, accessibility checker, JavaScript debugger, network monitor, and multi-account containers for isolating sessions per website or client. Firefox's Enhanced Tracking Protection blocks third-party trackers, fingerprinters, and cryptominers by default. As the only major browser engine not based on Chromium, Firefox is essential for cross-browser testing and for developers who want their sites to work outside the Blink rendering engine. It is the preferred browser for frontend developers who value privacy and want the most complete set of built-in developer tools.
Best for
Best for developers who want powerful built-in DevTools and a privacy-respecting alternative to Chromium-based browsers.
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