Firefox Developer Edition 47.0

Firefox Developer Edition is a version of Mozilla product created specifically for software developers. It has several new features and unique functionality. This version of the browser can actually operate independently of standard Firefox and family browsers like Safari. It borrows the default colors and interface elements from the developer tool set which makes the interface itself easy to use and navigate if you have any experience in development of products in this line.

Some of the new tools, like the Valence add-on, give you access to Firefox developer tools for other browsers. Other notable features include things like Responsive Design View, which lets users change screen sizes in real-time without adjusting size of their browser window. Then, there's the style editor, a tool that lets you edit CSS page styles, to create your own variations and apply existing CSS style sheets to other pages.

Firefox Developer Edition is an all-in-one toolbox for people into browser development. It has all the basic tools and some of the more advanced features one would expect from a software bundle like this.

v47.0 [Mar 9, 2016]
- Functionality in about:debugging to simulate Push messages for testing
- Allow users to view and debug all the registered SWs in about:debugging#workers
- New Devtools for Service Workers adds a button to start registered SWs
- Added support for WebKitCSSMatrix to improve mobile Web compatibility
- Smart multi-line input in the Web Console
- Review Firefox performance data in about:performance
- WebCrypto: RSA-PSS signature support
- Allow no-cache on back/forward navigations for https resources
- WebCrypto: PBKDF2 supports SHA-2 hash algorithms
. “FUEL (Firefox User Extension Library) has been removed, add-ons relying on it will stop working, use add-on SDK instead.“
- cuechange events are now available on TextTrack objects
- Implemented Document.scrollingElement to tell which element's scroll attributes reflect the viewport scroll state
- Tilt removed from Firefox Developer Tools
- Custom user agents supported in Responsive Design Mode.