Firefox Beta

October 21, 2019

Version 71.0beta, first offered to Beta channel users on October 21, 2019


  • Firefox has a new command line parameter, --kiosk, that opens Firefox in fullscreen mode

  • Windows users now have the ability to pop out videos on the web into an always-on-top video player using the Picture-in-Picture feature! For most videos, this can be accomplished by hovering the video with the mouse, and clicking on the Picture-in-Picture toggle.

  • Locales added: Catalan (Valencian) (ca-valencia), Tagalog (tl), Triqui (trs)


  • Redesigned internal configuration page (about:config)

  • A new Certificate Viewer that is easier to use, with more features and more detailed information.


Web Platform

  • Subgrid greatly enhances the utility and flexibility of grid layouts by allowing the grid of a child to use the tracks defined on the parent. In addition, the DevTools grid inspector has been improved to support subgrid.

All Firefox Beta downloads