What's new in Mozilla Firefox Developer Edition 42.0 Alpha 2

Aug 24, 2015
  • Improved private browsing windows block some web page elements that could track your web behavior across sites
  • GTK3 integration (GNU/Linux only)
  • Hardware acceleration for 2D canvas content (Mac OS X only)
  • Indicator added to tabs that play audio with one-click muting (Adobe Flash supported since version 19)
  • Process separation enabled by default in Developer Edition
  • Intuitive Control Center contains restyled site security, site identity and private browsing
  • Improved performance on interactive websites that trigger a lot of restyles
  • Add-on signing enforcement
  • Implemented ES6 Reflect
  • Implemented Push API via Service Workers
  • Asynchronous call stacks now allow web developers to follow the code flow through setTimeout, DOM event handlers, and Promise handlers.
  • Remote website debugging over WiFi (no USB cable or ADB needed)
  • Configurable Firefox OS Simulator in WebIDE, to simulate reference devices like phones, tablets, even TVs
  • CSS filter presets in the Inspector

New in Mozilla Firefox Developer Edition 3.6.16 (Mar 23, 2011)

  • Firefox 3.6.16 blacklists a few invalid HTTPS certificates.

New in Mozilla Firefox Developer Edition 3.0.13 Beta (Aug 3, 2009)

  • Fixed several security issues.
  • Fixed several stability issues.