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Firefox Beta

November 8, 2017

Version 58.0beta, first offered to Beta channel users on November 8, 2017


  • Added support for credit card autofill

  • WebVR has been enabled for Mac OS X users

  • Added Nepali (ne-NP) locale

  • Optimize page load by caching JavaScript internal representation

  • Improved page render speed for Windows users with Off-Main-Thread Painting



  • User profiles created in Firefox 58 (and in future releases) are not supported in previous versions of Firefox. Users who downgrade to a previous version should create a new profile for that version. Learn about alternatives to downgrading on our support site.


  • On Windows and Linux, Firefox crashes occasionally on Intel Broadwell-U processors with old microcode. Windows users should ensure Windows Update is set to install updates. Linux users should ensure that the distribution package for Intel microcode is installed.