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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.

62.0a1 Firefox Nightly

May 7, 2018

Version 62.0a1, first offered to Nightly channel users on May 7, 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.


  • Added a Clear Site Data and Cookies button to the identity popup located next to the address bar so as to provide a quick and easy process to delete local data for the visited website

    Bug 1462469
  • New tab page sections such as top sites, highlights, and Pocket can be adjusted to include 1 to 4 rows in the Preferences

    Bug 1400536
  • If Firefox Nightly is running when Windows shuts down (by manual user shutdown or automatic Windows Update reboot), your browser session will be automatically restored when you login after reboot

    Bug 603903
  • Added a button to the hamburger menu to toggle Tracking Protection on and off

    Bug 1462468
  • Added a Reopen in Container context menu item to tabs so as to reload the page in a new tab within a different container

    Bug 1376119


  • The description field for bookmarks has been removed. Users who manually changed the field can export old descriptions via html or json. Stored descriptions will be removed in a future release.

    Bug 1463738


Web Platform

  • JavaScript library for interactive editing of CSS Shapes values in the browser, with functional values like polygon(), circle() and ellipse()

    Bug 1242029
  • CSS Variable Fonts (OpenType Font Variations) enable a single font file to behave like multiple fonts

    Bug 1302685

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All Firefox Nightly downloads