Mozilla Firefox Error Code SEC_ERROR_REVOKED_CERTIFICATE: How to Fix It

Easy 10-20 minutes Critical Severity Verified June 2026
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Error Code
SEC_ERROR_REVOKED_CERTIFICATE
Brand
Mozilla Firefox
Product Type
browser
Severity
Critical
DIY Difficulty
Easy
Estimated Fix Time
10-20 minutes
The SEC_ERROR_REVOKED_CERTIFICATE error in Mozilla Firefox occurs when a website's SSL certificate has been revoked by the Certificate Authority, making it unsafe to visit. This security feature protects you from potentially compromised websites, but sometimes legitimate sites can be affected temporarily.
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Tools You'll Need

How to Fix Error Code SEC_ERROR_REVOKED_CERTIFICATE

  1. Verify the Website URL

  2. Check Date and Time Settings

  3. Clear Firefox Cache and Cookies

    This will log you out of all websites and clear saved preferences

  4. Restart Firefox in Safe Mode

  5. Update Firefox to Latest Version

  6. Reset Firefox Certificate Store

    Making incorrect changes in about:config can cause browser instability

  7. Check Antivirus and Firewall Settings

    Remember to re-enable your antivirus protection after testing

  8. Try Alternative DNS Servers

  9. Contact Website Administrator

    Never proceed to a website if you're unsure about its legitimacy
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When to Call a Professional

Contact your IT department or a computer technician if you're on a corporate network and the error persists across multiple devices, or if you're uncomfortable modifying browser settings. For websites you manage, contact your web hosting provider or SSL certificate vendor.

Frequently Asked Questions

What does SEC_ERROR_REVOKED_CERTIFICATE mean in Firefox?
This error means the website's SSL certificate has been revoked by the Certificate Authority, indicating a potential security issue. Firefox blocks access to protect you from compromised or unsafe websites.
Is it safe to bypass the SEC_ERROR_REVOKED_CERTIFICATE error?
Generally, no. This error exists for your protection. Only bypass it if you're certain the website is legitimate and the certificate revocation is a temporary issue that the site owner is addressing.
Why am I getting this error on websites that worked before?
Certificates can be revoked due to security breaches, private key compromise, or administrative errors. Your computer's date/time being incorrect or antivirus software interference can also trigger this error.
How long does it take for a revoked certificate to be fixed?
Once a website owner obtains a new certificate, it typically takes 24-48 hours to propagate across the internet. However, some DNS and browser caches may take longer to update.
Can outdated Firefox cause certificate errors?
Yes, outdated Firefox versions may have problems with newer certificate standards or security protocols. Always keep Firefox updated to the latest version for optimal security and compatibility.

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