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

February 10, 2020

Version 75.0a1, first offered to Nightly channel users on February 10, 2020

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.

Warning: 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.


  • Picture-in-Picture now supports keyboard controls, on most websites, for Play / Pause, Volume and Seeking (see Bug 1602841 for the list of keyboard controls)

    Bug 1602841


  • DNS over HTTPS (with Cloudflare as the DNS resolver) will be rolled out for users, turning the option on by default for users in the United States. For an alternate DNS service, users can select NextDNS via the Network Settings dialog in Preferences.

  • The behavior when clicking on the Address Bar and the Search Bar has been unified across all the desktop platforms. In particular on Linux a single click selects all without primary selection, a double click selects a word, and a triple click selects all with primary selection.

    Bug 333714
All Firefox Nightly downloads