Firefox Developer
Edition

Firefox Developer Edition (was Aurora) is the rapid-fire release channel for the next iteration of the Firefox Web browser. The Developer channel is where users can test the latest features and innovations. Users can expect an increase in polish from the raw, cutting edge features in the nightly builds. These releases may not be as stable as beta or final releases.

With Firefox Developer Edition:

• Experience the newest innovations in an unstable environment that's not for the faint of heart
• Provide feedback on features and performance to help determine what makes the final release

• Performance Enhancements:
  • Quantum CSS improvements which improve page rendering times
  • Improved page rendering speed with the new retained display list feature
  • Faster switching between tabs on Windows and Linux
  • WebExtensions now run in their own process on MacOS
• On-by-default support for the latest draft of the TLS 1.3specification
• Various improvements for dark theme support will provide a more consistent experience across the entire Firefox UI
• Added the ability to share current the URL with MacOS sharing providers from the Page Actions menu
• OpenSearch plugins offered by web pages can now be added from the page action menu for easier installation
• Improved support for allowing WebExtensions to manage and hide tabs