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How to Fix Firefox Secure Connection Failed Error Code - How to Trust Self-Signed Certificates on Localhost-Troubleshoot Edge Sync Failure After Update

Updated 2026-07-28 12:41:03macos-help
How to Fix Firefox Secure Connection Failed Error Code - How to Trust Self-Signed Certificates on Localhost-Troubleshoot Edge Sync Failure After Update
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.