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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.

87.0a1 Firefox Nightly

January 25, 2021

Version 87.0a1, first offered to Nightly channel users on January 25, 2021

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.


  • Experimental support to keep the Address Bar panel open during Input Method composition of a grapheme can be enabled in the Nightly Experiments section of Firefox Nightly preferences. Note that the Input Method picker panel may cover the Address Bar results, thus for now this is only suggested for Input Methods not opening a picker panel.

    Bug 1673971


  • To prevent user data loss when filling out forms, we’ve disabled the Backspace key as a navigation shortcut for the back navigation button. To re-enable the Backspace keyboard shortcut, you can change the about:config preference browser.backspace_action to 0. You can also use the recommended Alt + Left arrow (Command + Left arrow on Mac) shortcut instead.
    Firefox keyboard shortcuts

    Bug 1041377

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