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DNS Probe Finished NXDOMAIN: Fix When ipconfig /flushdns Fails - Troubleshooting Nginx Upstream Connection Refused-Fix Firefox Secure Connection Failed Due to Proxy Settings

Updated 2026-07-28 11:54:21browser-issues
DNS Probe Finished NXDOMAIN: Fix When ipconfig /flushdns Fails - Troubleshooting Nginx Upstream Connection Refused-Fix Firefox Secure Connection Failed Due to Proxy Settings
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  • Match the tool to the workflow that fails most often, not only the feature list.
  • Keep export format, permissions, and automation limits in the final decision.

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