Firefox ESR
Release Notes

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 system requirements of this release.

Firefox ESR

June 30, 2020

Version 78.0esr, first offered to ESR channel users on June 30, 2020

Firefox 78 ESR includes all of the enhancements since Firefox 68 along with many new features to make your enterprise deployments easier and even more flexible.

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


  • Some of the highlights of the new Extended Support Release are:

    • Kiosk mode
    • Client certificates
    • Service Worker and Push APIs are now enabled
    • The Block Autoplay feature is enabled
    • Picture-in-picture support
    • View and manage web certificates in about:certificate

    For more information about what's new in the Firefox 78 ESR release, see the more detailed release notes at

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