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Home / developer-tools / Firefox Not Responding? Try Safe Mode Troubleshooting Steps - How to Resolve npm EACCES Errors Using NVM-Fix 'Could not get lock /var/lib/apt/lists/lock' on Ubuntu

Firefox Not Responding? Try Safe Mode Troubleshooting Steps - How to Resolve npm EACCES Errors Using NVM-Fix 'Could not get lock /var/lib/apt/lists/lock' on Ubuntu

Updated 2026-06-13 12:50:29developer-tools
Firefox Not Responding? Try Safe Mode Troubleshooting Steps - How to Resolve npm EACCES Errors Using NVM-Fix 'Could not get lock /var/lib/apt/lists/lock' on Ubuntu
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.