Version 72.0, first offered to Release channel users on January 7, 2020
We'd like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox.
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Firefox’s Enhanced Tracking Protection marks a major new milestone in our battle against cross-site tracking: we now block fingerprinting scripts by default for all users, taking a new bold step in the fight for our users’ privacy.
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Firefox replaces annoying notification 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.
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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.
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Support for blocking images from individual domains has been removed from Firefox, because of low usage and poor user experience.
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Experimental support for using client certificates from the OS certificate store can be enabled by setting the preference
security.osclientcerts.autoloadto true (Windows only).
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Debugger Watchpoints let developers observe object property access and writes for easier to track data flow through an application.
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Firefox now supports simulation of meta viewport in Responsive Design Mode.