Firefox Error Code

Firefox Error Code Support Center | Nevada

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How to Resolve the error code “SEC_ERROR_UNKNOWN_ISSUER” on your Website

Firefox must verify that the certificate is presented by the website is valid. If the certificate can not be validated then Firefox will stop the connection to the website and instead will show a “Your connection is not secure” error message. Error code “SEC_ERROR_UNKNOWN_ISSUER” on websites .

What does “Your connection is not secure” mean?

When Firefox connects with a secure website (URL starts with “https: //”), then it should know that the certificate presented by the website is valid and that enough encryption for your privacy is strong enough.

What to do if you See Your Connectionon Is Not Secure Error?

If you receive such an error message, then it is possible, you should contact the website owner and inform them of the error. It is recommended that you wait before deciding to use the website.

The safest thing is to go back or visit a different website. Unless you understand the technical reason and why do not you consider the website to present a false identity,

and you want to take the risk of communicating on a connection that is vulnerable to secretly talking, you should not go ahead on the website…

The certificate expired on (date)

Error Code


This error occurs when the website’s identity certification has ended.

The error text will also show the current date and time of your system. If this is incorrect, to fix the problem, set your system clock to today’s date and time (double-click the clock icon on the Windows taskbar).

How To troubleshoot Time-Related Errors in Firefox  website

Firefox can not confirm that the connection is secure and therefore “Your connection is not secure” error page opens To verify that no certificate has been aborted, depending on when your system and a web server is set to the right time.

You can get a list of time-related error codes


The text on the error page will warn you when Firefox detects that your system time is probably wrong and also show the date and time currently set in your system. If the clock settings are incorrect you should set it to the right time 

Step To Set your System Clock Correctly IN Firefox

Step 1-

Click the Windows Start button or press the Windows key Windows key

Step 2-

In the Start menu, click Control Panel.

Step 3-

In Control Panel window, click the clock, language, and area, and then click on the date and time.

Step 4-

To change your settings, click on Change Date and Time to open the current date and time settings panel.

Step 5-

To fix your changes

If your Firefox Error Code Issues is not resolved you can ask your queries to our Expert team.