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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

What's New

Version 51.0a2:
  • Support saving passwords for forms without 'submit' events
  • Improved video performance for users without GPU acceleration:
  • Less CPU usage
  • Better full-screen experience
  • Zoom indicator is shown in the URL bar if the zoom level is not at default level
  • View passwords from the prompt before saving them
  • Added support for


  • OS X 10.9 or later

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Firefox Developer Edition User Discussion

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Current Version (51.x)


Downloads 19,456
Version Downloads 167
License Free
Date 29 Sep 2016
Platform Intel 64 / OS X / Intel 32
Price Free
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