This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Insecure Connection

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

more options

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.

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)

more options
more options

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.

more options

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 (https://xxx.xxx) 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.