Firefox download 58 version

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 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.
• 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

Developer

• Implemented the PerformanceNavigationTiming API
• Added rushbrookrathbone.co.ukStart so sites can measure service worker startup time

Developer Information

unresolved

• Users running Firefox for Windows over a Remote Desktop Connection (RDP) may find that audio playback is disabled due to increased security restrictions.
• Users running certain screen readers may experience performance issues and are advised to use Firefox ESR until performance issues are resolved in an upcoming future release
• When using certain non-default security policies on Windows (for example with Windows Defender Exploit Protection or Webroot security products), Firefox may fail to load pages (bug ).