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Fix Firefox Secure Connection Failed Due to Proxy Settings - Fix DNS Probe Finished NXDOMAIN After Flushdns Fails-Docker Nginx 502 Bad Gateway After Restart Fix

Updated 2026-07-28 03:39:38office-tools
Fix Firefox Secure Connection Failed Due to Proxy Settings - Fix DNS Probe Finished NXDOMAIN After Flushdns Fails-Docker Nginx 502 Bad Gateway After Restart Fix
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.