Updates 1/23/18 - FF 58

New

• Performance improvements, including:

  • Rendering graphics for Windows users by using Off-Main-Thread Painting (OMTP)
  • Loading pages faster by changing how Firefox caches and retrieves JavaScript

• Improvements to Firefox Screenshots:

  • Copy and paste screenshots directly to your clipboard
  • Firefox Screenshots now works in Private Browsing mode

• Added support for credit card autofill

• Added Nepali (ne-NP) locale

• In case you missed it—57 Release privacy and performance feature:
  Users can enable Tracking Protection at all times. Learn how to turn Tracking Protection on.

Fixed

• Fonts installed in non-standard directories will no longer appear blank for Linux users

• Various security fixes

Changed

• 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.

• Added a warning to alert users and site owners of planned security changes to sites affected by the gradual distrust plan for the Symantec certificate authority

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Available via the internal updater:   Help  / About Firefox