Firefox error sec_error_expired_issuer_certificate

If you are having issues with Firefox then you might encounter the error code Sec_Error_Expired_Issuer_Certificate when you try to access your account information or when you try to log into your account on Firefox. This error can occur when your security certificate expires or when it gets invalidated by Mozilla Corporation because of some changes made by them in their system. This error can be annoying and frustrating because you cannot access your account properly or you cannot log into your account on Firefox anymore.

The problem can be caused by a server error or a network error but sometimes other applications are interfering with the proper functioning of Firefox on your computer. This can be caused by a virus or a malware that is installed on your computer. To fix this error, you need to try a few solutions.

First of all, the most common cause of this error is that the security certificate on your account has expired. So, keep all 128 bit SSL3 ciphers disabled. This is because some SSL3 ciphers are less secure than others. Also, keep all 128 bit ciphers enabled for security.ssl3.rsa_rc4_128_md5 or security.ssl3.rsa_rc4_128_sha.

Another solution is to update your time zone to one that is compatible with the current time zone. To do this, go to your settings menu and select Date and Time > Adjust Date/Time. Click on the Set Time Automatically > Add Clocks for Different Time Zones Internet Time > Change Settings and enable the Synchronize with an Internet Time Server option. After that, select time.windows.com and click on the Update Now button.

Finally, you can configure the security settings on Firefox. To do this open the Command Prompt by pressing the Windows Key + X and then type in Command Prompt (Admin) and press Enter. In the command prompt, type in the following commands after "C:WINDOWSsystem32>":

regsvr32 softpub.dll

Regsvr32 Wintrust.dll

Regsvr32 Wintrust.dll

Then, restart Firefox.