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Fix Firefox 'Profile Missing Permission Denied' Error - Fix Black Screen on RDP Login-High CPU Usage by cmd.exe: Admin Checklist

Updated 2026-06-14 05:16:29developer-tools
Fix Firefox 'Profile Missing Permission Denied' Error - Fix Black Screen on RDP Login-High CPU Usage by cmd.exe: Admin Checklist
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.