Firefox Developer Edition
Release Notes

Improved private browsing windows block some web page elements that could track your web behavior across sites

Control Center that contains site security and privacy controls

Indicator added to tabs that play audio with one-click muting

GTK3 integration (GNU/Linux only)

Hardware acceleration for 2D canvas content (Mac OS X only)

Process separation enabled by default in Developer Edition

Login Manager improvements:

• Improved heuristics to save usernames and passwords
• Edit and show all logins in line, Copy/Paste usernames/passwords from the Context menu
• Migration imports your passwords to Firefox from Google Chrome for Windows and Internet Explorer; import anytime from the Login Manager

WebRTC improvements:

• IPV6 support
• Preferences for controlling ICE candidate generation and IP exposure
• Hooks for extensions to allow/deny createOffer/Answer
• Improved ability for applications to monitor and control which devices are used in getUserMedia

Improved performance on interactive websites that trigger a lot of restyles

Remote website debugging over WiFi (no USB cable or ADB needed)

Asynchronous call stacks now allow web developers to follow the code flow through setTimeout, DOM event handlers, and Promise handlers.

Configurable Firefox OS Simulator in WebIDE, to simulate reference devices like phones, tablets, even TVs

CSS filter presets in the Inspector

Ability to save filter presets inside CSS Filter Tooltip

Add-on signing enforcement

Implemented ES6 Reflect

Ship Push messaging with disabled web notifications from ServiceWorkers

Support ImageBitmap and createImageBitmap()

Media Source Extension for HTML5 video available for all sites

The CTRL+K shortcut does not give focus to the search field when used from the URL bar on GNU/Linux with GTK+ 3.14 and 3.16 (1176929)