Firefox Nightly
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 Nightly

March 12, 2018

Version 61.0a1, first offered to Nightly channel users on March 12, 2018

Firefox Nightly gets updated every day and as a consequence, the release notes for the Nightly channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports. Features listed here may or may not make a final release of Firefox.

In addition to these release notes, you can follow ongoing development on our @FirefoxNightly Twitter account as well as read our Nightly Blog.


  • Tab warming was enabled for Nightly making tab switching more efficient in some cases. You can learn more about Tab Warming in this article

    Bug 1423220
  • OpenSearch plugins offered by web pages can now be added from the page action menu

    Bug 1221539
  • Locale added: Crimean Tatar (crh)

    Bug 1455044
  • Add the ability to share current URL with MacOS sharing providers

    Bug 1363168
  • Locale added: English (CA)

    Bug 1457942


  • Dark Themes now affect the menus, notification panels, URL bar and search drop-downs.

    Bug 1432172


  • The settings for customizing your homepage and new tab page have
    been moved to a new Options/Preferences section called Home

    Bug 1417155


All Firefox Nightly downloads