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  • Last reply by cor-el

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use always firefox , use now PC windows 10, but since near week have a problem only with firefox , do not have this problem chrome , now because this use chrome , can you support to fix this problem, uninstall firefox, after restart PC, reinstall firefox do not have any change with problem , after that cleared everything in the history , do not have any change about problem, after that use Troubleshooting Information after them refresh firefox , do not change anything , use Troubleshooting Information after that restart with adds disabled , do not have any chane with problem , why. send to your support picture a problem with the text message error imported. Error code: SEC_ERROR_UNKNOWN_ISSUER. this problem have with website is very secure example https://connect.bein.net/ or https://www.youtube.com/ need to your support. imported. Error code: SEC_ERROR_UNKNOWN_ISSUER The owner of connect.bein.net has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website connect.bein.net uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be. very need to your support .

thanks for help.

use always firefox , use now PC windows 10, but since near week have a problem only with firefox , do not have this problem chrome , now because this use chrome , can you support to fix this problem, uninstall firefox, after restart PC, reinstall firefox do not have any change with problem , after that cleared everything in the history , do not have any change about problem, after that use Troubleshooting Information after them refresh firefox , do not change anything , use Troubleshooting Information after that restart with adds disabled , do not have any chane with problem , why. send to your support picture a problem with the text message error imported. Error code: SEC_ERROR_UNKNOWN_ISSUER. this problem have with website is very secure example https://connect.bein.net/ or https://www.youtube.com/ need to your support. imported. Error code: SEC_ERROR_UNKNOWN_ISSUER The owner of connect.bein.net has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website connect.bein.net uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be. very need to your support . thanks for help.

Modified by James

Chosen solution

There is security software like Avast and Kaspersky and BitDefender and ESET that intercepts secure connections and sends their own certificate or that incorporates special web shielding features that can block content.


If you can't inspect the certificate via Advanced (I Understand the Risks) then try this:

Open the "Add Security Exception" window by pasting this chrome URL in the Firefox location/address bar and check the certificate:

  • chrome://pippki/content/exceptionDialog.xul

In the location field of this window type or paste the URL of the website with the https:// protocol prefix (https://xxx.xxx).

  • retrieve the certificate via the "Get certificate" button
  • click the "View..." button to inspect the certificate in the Certificate Viewer

You can inspect details like the issuer and the certificate chain in the Details tab of the Certificate Viewer. Check who is the issuer of the certificate. If necessary then please attach a screenshot that shows the Certificate Viewer with the issuer.

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Chosen Solution

There is security software like Avast and Kaspersky and BitDefender and ESET that intercepts secure connections and sends their own certificate or that incorporates special web shielding features that can block content.


If you can't inspect the certificate via Advanced (I Understand the Risks) then try this:

Open the "Add Security Exception" window by pasting this chrome URL in the Firefox location/address bar and check the certificate:

  • chrome://pippki/content/exceptionDialog.xul

In the location field of this window type or paste the URL of the website with the https:// protocol prefix (https://xxx.xxx).

  • retrieve the certificate via the "Get certificate" button
  • click the "View..." button to inspect the certificate in the Certificate Viewer

You can inspect details like the issuer and the certificate chain in the Details tab of the Certificate Viewer. Check who is the issuer of the certificate. If necessary then please attach a screenshot that shows the Certificate Viewer with the issuer.