Software⏱️ 2 min read📅 2026-05-30

How to Fix: How to fix/investigate Windows Defender detecting malware in the VSS snapshots for Firefox cached files?

Windows Defender detecting malware in VSS snapshots for Firefox cached files is a known issue, possibly caused by a false positive. Removing bypass and updating software may resolve the problem.

Quick Answer: Remove path exclusion in Windows Defender and ensure software is updated to prevent malware detection.

Windows Defender detecting malware in the VSS snapshots for Firefox cached files is a known issue that can be caused by various factors, including outdated or corrupted system files, conflicting security software, or even legitimate Firefox extensions.

💡 Why You Are Getting This Error

  • [Cause]

✅ Best Solutions to Fix It

Method 1: Update Firefox and Clear Cache

  1. Step 1: Close Firefox and navigate to the Firefox cache clearing page.

Method 2: Disable VSS Snapshots for Firefox Cached Files

  1. Step 1: Open the Windows Defender app and navigate to Windows Defender settings.

💡 Conclusion

By following these steps, you should be able to resolve the issue of Windows Defender detecting malware in the VSS snapshots for Firefox cached files. If you're still experiencing issues, it may be worth reaching out to Mozilla support or seeking further assistance from a qualified IT professional.

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