Nov 1, 2018

Firefox Developer Edition - The only browser made just for developers

  • Designed for developers

    The only browser made just for developers, Firefox Developer Edition was created with your workflow in mind. Build, test, scale and more all from one place, for the first time ever.
  • Debug any browser

    Inspect and debug your app across any browser or device with Valence — a powerful, pre-installed extension that you’ll only find in Firefox Developer Edition.
  • Pixel-perfect coding

    Target screen sizes with the Responsive Design View and tweak your CSS on the fly with the built-in Style Editor for pixel-perfect coding.
Firefox Developer Edition is available at firefox.com/developer