Mozilla Firefox browser is one of the widely used web browsers worldwide. However, there comes a time when you may encounter common glitches and issues that will prevent you from accessing websites. One example is the error code SEC_ERROR_UNKNOWN_ISSUER.
The security issue is mostly due to your browser not able to recognize or trust the internal SSL certificate authority on the website. It may not be a cause of panic, however, it will still keep you from getting through to the site.
So, how to troubleshoot the problem on Firefox?
Workarounds to Resolve SEC_ERROR_UNKNOWN_ISSUER Error on Firefox Web Browser
Fortunately, there are several possible solutions that you can try to fix the SSL certificate issue on Mozilla Firefox. Let’s check them out below.
1. Do a Virus Scan on your System
Launch your antivirus software and perform a virus scan. Try to remove the virus and restart your device. You may try relaunching the website on your Firefox browser.
2. Verify Firefox Certificate Authorities
Click the three-dotted icon on your browser and select Preferences or Options. You may also navigate to about:preferences in the address bar. Go to the search bar and enter cert. Click View Certificates. Click the Authorities tab. Look for the Certificate Authority that issues the certificate on the website. If you cannot find the Certificate Authorities, you can contact them regarding the issue.
3. Import Signing Certificate
To do this method, you need to have the SSL certificate. Navigate to the Preferences settings of your Firefox browser. Go to View Certificates. Head over to the Authorities tab. Now, import the security software’s certificate.
4. Add the Website as Exception
If you trust the website, you can add it as a security exception on your Firefox browser. Access the site and click the Advanced button found in the error message. Select Add Exception. Click Confirm Security Exception.
5. Set Security Certificates Value to True
On your Firefox browser tab, enter about:config in the address bar. Click the accept risk option. Go to the search bar and enter enterp. Look for security.enterprise_roots.enabled and switch the value from False to True.
Performing these fixes above can help you troubleshoot the error on your Firefox browser.
