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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.

60.0esr Firefox ESR

May 9, 2018

Version 60.0esr, first offered to ESR channel users on May 9, 2018

Firefox 60 ESR marks the launch of Firefox Quantum in the ESR channel. It’s an entirely new browser, built from the ground up for speed, stability, and access to features and content.
Firefox 60 also brings a new policy engine and Group Policy support for enterprise deployments. For more info about why and how to use Firefox in the enterprise, see this blog post.


  • Firefox Quantum arrives in the ESR channel. Key features include:

  • Support for enterprise environments, with a policy engine that allows customized Firefox deployments using Windows Group Policy or a cross-platform JSON file



  • Service workers and push notifications remain disabled in Firefox ESR

  • In Firefox 58 and later, and in Firefox 60 ESR and later, Firefox uses a new format for storing private keys, certificates and certificate trust

    • Users who store their home directory or application data directory on a network filesystem are advised to set the environment variable NSS_SDB_USE_CACHE=yes prior to starting Firefox
    • Without setting this environment variable, users of network filesystems may experience a major slowdown when starting and using Firefox
    • The environment variable enables the use of a caching strategy in NSS that works around the slowness of network filesystems. Because this caching strategy causes a performance decrease on fast filesystems, it isn't used by default, but requires users to explicitly enable it by setting the environment variable

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