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

October 22, 2018

Version 65.0a1, first offered to Nightly channel users on October 22, 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.



  • The "Warn you when quitting and closing multiple tabs" warning now applies to quitting Firefox with automatic session restore turned on

    Bug 550559


All Firefox Nightly downloads