Firefox Edge Browser Error Code SEC_ERROR_REVOKED_CERTIFICATE: How to Fix It

Easy 10-30 minutes Medium Severity Verified June 2026
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Error Code
SEC_ERROR_REVOKED_CERTIFICATE
Brand
Firefox Edge
Product Type
browser
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
10-30 minutes
The SEC_ERROR_REVOKED_CERTIFICATE error in Firefox means the website you are trying to visit has a security certificate that has been deliberately revoked by the certificate authority that issued it. This usually happens because the site owner's certificate was compromised, misused, or the site may no longer be trusted. Firefox blocks access to protect you from potential security risks, but in some cases it can also be triggered by local system issues like incorrect date/time settings or security software interference.
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Tools You'll Need

How to Fix Error Code SEC_ERROR_REVOKED_CERTIFICATE

  1. Check Your System Date and Time

  2. Clear Firefox Certificates Cache and Browser Data

  3. Disable HTTPS Scanning in Your Antivirus or Security Software

    Only disable your antivirus temporarily for testing purposes. Re-enable it immediately after testing. Do not browse to untrusted sites while antivirus protection is off.

  4. Check if the Website Itself Has a Revoked Certificate

    Do not bypass or ignore a genuine certificate revocation warning. A truly revoked certificate may indicate the site has been compromised or is fraudulent.

  5. Reset Firefox Certificate Settings via about:config

    Be careful when editing about:config settings. Only change the specific values mentioned here. Incorrect changes can affect Firefox's behavior and security.

  6. Update Firefox to the Latest Version

  7. Refresh Firefox (Reset to Default Settings)

    Refreshing Firefox will remove extensions, themes, modified preferences, and some other customizations. Your bookmarks, browsing history, passwords, open tabs, and personal dictionary will be preserved.
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When to Call a Professional

If you are on a work or school computer and the error persists across all steps, contact your IT department — the certificate issue may be related to corporate network policies, a VPN, or a managed device certificate store that only an administrator can fix. If the website you are trying to reach is your own website and its certificate has been revoked, contact your web hosting provider or the certificate authority (such as Let's Encrypt, DigiCert, or Comodo) to understand why the certificate was revoked and to obtain a new, valid certificate.

Frequently Asked Questions

Is it safe to ignore or bypass the SEC_ERROR_REVOKED_CERTIFICATE error in Firefox?
No, it is generally not safe to bypass this error. A revoked certificate means the certificate authority has specifically invalidated the site's security credentials, often because the site was compromised or the private key was exposed. Firefox intentionally does not provide an 'Add Exception' bypass for revoked certificates the way it does for some other certificate errors. If you need to access the site, contact the site owner to have them install a valid certificate.
Why does SEC_ERROR_REVOKED_CERTIFICATE only appear in Firefox and not in Chrome or Edge?
Firefox uses its own built-in certificate store and OCSP (Online Certificate Status Protocol) checking, which is independent of the operating system. Chrome and Edge rely partly on the Windows or macOS system certificate store and may handle revocation checks differently. If the error only appears in Firefox, it could be caused by a corrupted Firefox certificate cache, an antivirus program inserting its own certificate that Firefox does not trust, or a Firefox-specific configuration issue.
What does it mean when a certificate is revoked?
A digital certificate is revoked when the certificate authority (CA) that issued it decides the certificate can no longer be trusted. This can happen if the website's private key was stolen or exposed, if the certificate was issued by mistake, or if the website owner requested revocation. When Firefox detects a revoked certificate via OCSP or a CRL (Certificate Revocation List), it blocks access to protect you from potential man-in-the-middle attacks or fraudulent sites.
Can antivirus software cause the SEC_ERROR_REVOKED_CERTIFICATE error?
Yes. Many antivirus programs perform HTTPS inspection by intercepting your encrypted web traffic and re-signing it with their own root certificate. If the antivirus software's certificate or its handling of a site's certificate is not fully trusted by Firefox, it can trigger certificate errors including revocation errors. Disabling HTTPS or SSL scanning within your antivirus settings (not the entire antivirus) often resolves this. Programs like Avast, AVG, Kaspersky, Bitdefender, and ESET are known to cause this type of conflict.
How do I fix SEC_ERROR_REVOKED_CERTIFICATE on a website I own?
If you own the website showing this error, you need to obtain and install a new SSL/TLS certificate from your certificate authority. First, contact your CA to understand why your certificate was revoked. Then generate a new certificate signing request (CSR) through your hosting panel or server, request a new certificate from your CA or a provider like Let's Encrypt, and install it on your web server. If you use cPanel, Plesk, or a managed hosting service, your hosting provider's support team can assist with certificate replacement.

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