To Fix the Mozilla Firefox “SEC_ERROR_UNKNOWN_ISSUER” Error on secure websites is sometimes annoying for users to rectify it. The error is associated with the certificate, which needs to validate, otherwise, Mozilla Firefox stops the connection to the website and show them something like secure error messages. Means, error code happen due to during secure connection a website essentials to provide a certificate issued by a trusted certificate authority in order to confirm that the user is connected to the intended target and the connection is encrypted.
If you get a “Your connection is not secure” error page and see the error code “SEC_ERROR_UNKNOWN_ISSUER”. Therefore, on websites which are supposed to be secure (the URL begins with “https://”), Firefox must verify that the certificate presented by the website is valid. If the certificate cannot be validated, Firefox will stop the connection to the website and show a “Your connection is not secure” error message instead. This article explains the simple troubleshooting solutions or steps to solve error “SEC_ERROR_UNKNOWN_ISSUER” on websites in an efficient manner. You can also take comprehensive guidance about it from the experts by connecting Mozilla Firefox technical support number.
Solutions to Fix the Mozilla Firefox “SEC_ERROR_UNKNOWN_ISSUER” Error
Solution 1:- Reinstall the Security Product
If you get this problem on multiple unrelated HTTPS-sites, that means it indicates that something on your system or network is intercepting your connection and injecting certificates in a way that is not trusted by Firefox.
Most of the time, the common causes are security software scanning encrypted connections or malware listening in, replacing legitimate website certificates with their own.
Generally, if your security product contains a feature to scan encrypted connections, you could try to reinstall the security product, which might trigger the software to place its certificates into the Firefox trust store again.
Follow these steps to do for particular security products:
In Avast security products you can disable the interception of secure connections:
- Open the dashboard of your “Avast” application.
- Then, go to “Settings”, and then “Active Protection” and then hit on “Customize” next to “Web Shield”.
- Uncheck the “Enable HTTPS Scanning” setting and confirm this by clicking “OK” button
For Bit defender:-
In Bitdefender security products you can disable the interception of secure connections:
- First, open the dashboard of your Bitdefender application.
- For the 2016 version of the Bitdefender security product, click on “Modules” option.
For the 2015 version of Bitdefender, click on “Protection”.
- Then, click on “Web Protection”.
- Next, toggle off the ‘Scan SSL” setting.
In Kaspersky security products you can disable the interception of secure connections:
- First, open the dashboard of your Kaspersky application.
- Then, click on “Settings” option on the bottom-left.
- Next, click “Additional” option and then “Network” option.
- If you use a 2016 version of Kaspersky: In the Encrypted connections scanning section, check the “Do not scan encrypted connections” option and confirm this change.
Alternatively, you can click on “Advanced Settings” in order to try to trigger a reinstallation of Kaspersky’s certificate. When the dialog opens, then click on “Install certificate…” and follow the on-screen instructions.
If you use a 2015 version of Kaspersky: uncheck the “Scan encrypted connections” option.
- Finally, reboot your system for the changes to take effect.
Solution 2:- Fix Malware Problem
Some forms of malware intercepting encrypted web traffic can cause this error message. Then connect with Mozilla Firefox customer service team to get the complete information or troubleshoot steps to fix this Firefox issues which caused by malware on how to deal with malware problems.
I hope your issue is fixed.
Dial Mozilla Firefox Helpline Number Now For Resolve Firefox Issues:-
You can call at Mozilla Firefox Customer Support Phone Number, dial 1800-240-2551 which is a very helpful number to deliver you immediate online help. The number will directly connect you with our Mozilla Firefox customer support team, where the well-talented and highly skilled technicians work 24×7/365 days for your support. The dexterous experts will provide you the steady and finest solutions to fix this Mozilla Firefox issue or others difficulties. Hence, call now on a toll-free number and grab the instant replies to fix the Mozilla Firefox technical mishaps.