See what’s new in Firefox!

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the complete list of changes in this release.

43.0

December 15, 2015

We'd also like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox!

Private Browsing with Tracking Protection offers choice of blocking additional trackers
Improved API support for m4v video playback
Firefox 64-bit for Windows is now available via the Firefox download page
Users can choose search suggestions from the Awesome Bar
On-screen keyboard displayed on selecting input field on devices running Windows 8 or greater
Firefox Health Report has switched to use the same data collection mechanism as telemetry

WebIDE now has a sidebar-based UI
Unprefixed 'hyphens' property is now supported
Network requests in Console now link to Network panel instead of opening in a popup
Subresource integrity allows developers to make their sites more secure
Added ability to display server-side logs in the console
Stack traces are now shown for exceptions inside the console
Ability to filter styles from their property names in the rules view
Search button next to overridden CSS properties to find similar properties in the rules view
New 'Use in Console' context menu item in Inspector to store selected element in a temporary variable
Bind F1 key to open the settings when the toolbox is focused
Markup view shows indicators for pseudo-classes locked for elements
Single-process mode is no longer supported for NPAPI plugins
Animation inspector now displays animations in a timeline
The 'transform-origin' property is now supported on SVG elements