New

• Firefox’sEnhanced Tracking Protection marks a major new milestone in our battle against cross-site tracking: we now blockfingerprinting scripts by default for all users, taking a new bold step in the fight for our users’ privacy.

• Firefox replaces annoyingnotification request pop-ups with a more delightful experience, by default for all users. The pop-ups no longer interrupt your browsing, in its place, a speech bubble will appear in the address bar when you interact with the site.

• Picture-in-picture video is now also available in Firefox for Mac and Linux: Select the blue icon from the right edge of a video to pop open a floating window so you can keep watching while working in other tabs or apps.Learn how the feature works.

Fixed

• Varioussecurity fixes

Changed

• Support for blocking images from individual domains has been removed from Firefox, because of low usage and poor user experience.

Enterprise

• Experimental support for using client certificates from the OS certificate store can be enabled by setting the preferencesecurity.osclientcerts.autoload to true (Windows only).

Developer

• Developer Information

• Debugger Watchpoints let developers observe object property access and writes for easier to track data flow through an application.

• Firefox now supports simulation of meta viewport in Responsive Design Mode.