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Insecure Connection

  • 3 replies
  • 1 has this problem
  • Last reply by cor-el

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I've been trying forever to setup something as a shop using PayPal, however, whenever I go to PayPal's sandbox website to test a purchase, I am told it is an insecure website. I have tried to add an exception to the entire site itself, and it simply doesn't work. This is very annoying as I prefer FireFox, and I have had to resort using Chrome as a backup, which hogs computer resources and doesn't have any of my passwords saved, so it makes my process very long and tedious.

All Replies (3)

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I don't have any anti-virus installed that could be doing this in the first place. I can attempt these fixes, but I, personally, do not see how they pertain to me as I don't have any security software installed.

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What specific error page do you get? Is this SEC_ERROR_UNKNOWN_ISSUER or something else?

See also:

You can check if there is more detail available about the issuer of the certificate.

  • click the "Advanced" button show more detail
  • click the blue error text (SEC_ERROR_UNKNOWN_ISSUER) to show the certificate chain
  • click "Copy text to clipboard" and paste the base64 certificate chain text in a reply

If clicking the blue error text doesn't provide the certificate chain then try these steps to inspect the certificate.

  • open the Servers tab in the Certificate Manager
    • Options/Preferences -> Privacy & Security
      Certificates: View Certificates -> Servers: "Add Exception"
  • paste the URL of the website ( in it's Location field

Let Firefox retrieve the certificate -> "Get Certificate"

  • click the "View" button and inspect the certificate

You can see detail like the issuer of the certificate and intermediate certificates in the Details tab.