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Fix Firefox Secure Connection Failed DNS Error - How to Turn On Defender Real-Time Protection Using Group Policy-Fix Detached HEAD in Git and Switch Branches

Updated 2026-07-28 14:30:42windows-fixes
Fix Firefox Secure Connection Failed DNS Error - How to Turn On Defender Real-Time Protection Using Group Policy-Fix Detached HEAD in Git and Switch Branches
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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