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 — English (US)

Your system may not meet the requirements for Firefox, but you can try one of these versions:

Firefox Nightly — English (US)

Firefox Nightly is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit

Download a different build

Firefox Nightly is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR

Firefox Privacy Notice

Version 57.0a1, first offered to Nightly channel users on August 2, 2017

Firefox Nightly gets a new version 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.

Firefox Nightly has a new logo
Bug 1387254
Added an option to the Page Action menu to report a website issue in Firefox Nightly and Firefox Dev Edition
Bug 1373650
Firefox Nightly now gets updated twice a day so as to help our communities in EMEA and Asia regions to catch regressions and report them during the Americas night.
Bug 1349227

The browser's "autoscrolling" feature now uses asynchronous scrolling, similar to other input methods like mousewheel, providing a smoother scrolling experience.
Bug 1385463

The "Share" button was removed. If you relied on this feature, you can install the Share Backported extension instead.
Bug 1388902
Firefox is getting a major Visual Redesign (Photon project) activated on the Nightly channel and which will ship with Firefox 57 on the release channel.
Bug 1346488