Version 86.0a1, first offered to Nightly channel users on December 15, 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.
Expanding credit card management and autofill capabilities to Canadian builds of Firefox
To prevent user data loss when filling out forms, the Backspace key as a navigation shortcut for "Go back one page" is now disabled. 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