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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.

67.0a1 Firefox Nightly

January 28, 2019

Version 67.0a1, first offered to Nightly channel users on January 28, 2019

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.


  • Firefox 67 willl be able to run different Firefox installs side by side by default.

    Bug 1474285
  • Tabs can now be pinned from the Page Actions menu in the address bar

    Bug 1528952
  • Users can block known cryptominers and fingerprinters in the Custom settings or their Content Blocking preferences

    Bug 1527917
  • The Import Data from Another Browser feature is now also available from the File menu

    Bug 1522856
  • Added a new about:compat page which allows the user to see, and temporarily disable, active site interventions in both Firefox for Desktop and Firefox for Android

    Bug 1488845
  • Firefox will now protect you against running older versions of Firefox which can lead to data corruption and stability issues.

    Bug 1455707


  • Firefox no longer supports handling webcal: links with

    Bug 1252831
  • Change to extensions in Private Windows: Any new extensions you add to the browser won’t work in Private Windows unless you allow this in the settings.

    Bug 1511636


  • The DevTools Changes panel now supports copying modified CSS. You can either copy the full changes or individual changed rules.

    Bug 1515875

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