Firefox Beta

July 13, 2021

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


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

  • Firefox now supports using logging into Microsoft, work and school sites using Windows SSO.

  • Locale added: Scots (sco)

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

  • HTTPS-First Policy: Firefox Private Browsing windows now attempt to make all connections to websites secure, and falls back to insecure connections only when a website does not support it.


  • 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.

Web Platform

All Firefox Beta downloads