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Websites must present a certificate from the certificate authority when connecting securely in order to confirm that they are connected to the target website and that the connection is encrypted. When opening a website, the message “SEC ERROR UNKNOWN ISSUER” indicates that Firefox’s default connection is not trusted because the certificate is unidentified.Only reputable certificate authorities (CAs) are permitted to issue trusted certificates under the Public Infrastructure Key (PKI) architecture.
In order to ensure that they are carrying out their due diligence with regard to validation and granting certificates in good faith, CAs adhere to strict guidelines in this area. If you receive an SEC ERROR UNKNOWN ISSUER message, your browser does not trust the issuer of your certificate. The same error code may also occasionally be accompanied by the message “warning: potential security risk ahead.” In some circumstances, you might as well experience the error if a virus or corruption error has infected your computer. Below we have mention the ways to Fix SEC_ERROR_UNKNOWN_ISSUER Error on FireFox.
Ways to Fix SEC_ERROR_UNKNOWN_ISSUER Error on FireFox
Antivirus programs
Third-Party Software
The SEC ERROR UNKNOWN ISSUER error could also be caused by antivirus software from a third party. It is strongly advised that you get rid of such software if you use it and switch to a Microsoft antivirus programme like Windows Defender. Reinstalling the software will be your best option if you do not want to uninstall it. Reinstalling the antivirus programme will enable it to add its certificate to Firefox’s repository, which may assist in fixing the issue.
Check Your Web Traffic Monitoring Software
Secure connections may be terminated by traffic monitoring software when they update their certificate. On HTTPS-enabled websites, they might result in errors. The best course of action in this situation is to speak with an IT expert who will identify a valuable fix for the error.
Ensure that the Website is Correctly Configured
There is no intermediate certificate present if a website visitor navigates through it and encounters the error message SEC ERROR UNKNOWN ISSUER or any other related error message. Some users might select the “Advanced” option to continue. However, the existence of such an error suggests that the certificate cannot be trusted because the issuer CA is unidentified, the server may not be transmitting the appropriate intermediate certificate, or it may be necessary to import an additional root certificate.
Restore the cert8.db File
Try Adding the Page to the Exceptions
After attempting all of the troubleshooting steps listed above in vain, you can add the website to the firefox exceptions if the SEC ERROR UNKNOWN ISSUER still occurs. You must select the “I understand the risk” checkbox. The next option you must select is Add exception. A window will appear. Click the Confirm security exception button. The page will open without issue after being added to the exceptions list.
About Firefox
The Mozilla Foundation and Mozilla Corporation created the open-source, free web browser Firefox in 2004. With Windows, Mac, and Linux operating systems, as well as Android and iPhone mobile devices, the Firefox web browser is usable. Firefox’s default search engine and homepage are both the Google search page. The Mozilla Manifesto, a set of guidelines created by the nonprofit Mozilla Foundation, serves as the foundation for Firefox. Firefox is a distinctive web browser because of its privacy and open source philosophies.
Firefox does not sell users’ personal information to advertisers or companies like Google, in contrast to Apple’s Safari and Google Chrome. Numerous modern standard browser features were first introduced and made popular by Firefox. One of the first browsers to offer a bookmark toolbar and tabbed browsing, which enables users to open tabs in the same window and switch between them, was the Firefox browser when it was first made available under the name Mozilla Firefox.
Features of Firefox
Final Words
We hope like our article on How to Fix SEC_ERROR_UNKNOWN_ISSUER Error on FireFox. When visiting a website with Firefox, this browser will check to see if the certificate it is using is legitimate. Firefox has the ability to break the connection to the website if it cannot be validated. Typically, you receive an error message with the error code sec error unknown issuer that reads, “Your connection is not secure.” Sometimes the same error code is accompanied by the message “warning: potential security risk ahead.” This error code indicates that Firefox does not recognize the certificate, making it untrustworthy by default. Additionally, it’s likely that you experience this error if your computer is infected with malware or a virus.