Firefox Beta and Developer Edition
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.

91.0beta Firefox Beta

July 13, 2021

Version 91.0beta, first offered to Beta channel users on July 13, 2021

New

  • Firefox now supports logging into Microsoft, work, and school accounts using Windows single sign-on. Learn more

  • The simplify page when printing feature is back! When printing, under More settings > Format select the Simplified option when available to get a clutter-free page. Learn more

  • HTTPS-First Policy: Firefox Private Browsing windows now attempt to make all connections to websites secure, and fall back to insecure connections only when websites do not support it. Learn more

  • We've added a new locale: Scots (sco)

  • The address bar now provides Switch to Tab results also in Private Browsing windows.

  • Firefox now automatically enables High Contrast Mode when "Increase Contrast" is checked on MacOS

Developer

Web Platform

Get the most recent version

All Firefox Beta downloads