Tue. Nov 19th, 2019

Mozilla Firefox 71 Beta 5 Released: Redesigned internal configuration page

1 min read

Mozilla Firefox 71 Beta 5 has been released.



  • Firefox has a new command line parameter, --kiosk, that opens Firefox in fullscreen mode
  • The Picture-in-Picture feature allows users on Windows to pop a video out from its webpage into a floating, resizable window that is always on top and viewable
  • 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.


Using the new server-timing information in DevTools’ Network panel, developers can analyze the server-related timings in context of other request and response details.

Developer 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.