Firefox Browser Developer Edition

Welcome to your new favorite browser. Get the latest features, fast performance, and the development tools you need to build for the open web.

Firefox Developer Edition — English (US)

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Firefox Developer Edition — English (US)

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Firefox Browser Developer Edition

The browser made for developers

All the latest developer tools in beta, plus experimental features like the Multi-line Console Editor and WebSocket Inspector.

A separate profile and path so you can easily run it alongside Release or Beta Firefox.

Preferences tailored for web developers: Browser and remote debugging are enabled by default, as are the dark theme and developer toolbar button.

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Convenient Features

Shapes Editor

Firefox DevTools has a brand new shape path editor that takes the guesswork out of fine-tuning your shape-outside and clip-path shapes by allowing you to very easily fine-tune your adjustments with a visual editor.

Learn more

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Faster Information

Fonts Panel

The new fonts panel in Firefox DevTools gives developers quick access to all of the information they need about the fonts being used in an element. It also includes valuable information such as the font source, weight, style and more.

Learn more

Design. Code. Test. Refine.

Build and Perfect your sites
with Firefox DevTools

Speak up

Feedback makes us better. Tell us how we can improve the browser and Developer tools.

Join the conversation

Get involved

Help build the last independent browser. Write code, fix bugs, make add-ons, and more.

Start now

Download the Firefox browser made for developers