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Firefox is telling me youtube has an insecure connection
When I try to visit youtube I get the error message "Did not connect: potential security issue." It tells me there's an insecure connection and won't give me the option of adding an exception. Of course I'm sure the problem must be on my end, since I can access youtube through firefox on any other computer, and I'm pretty sure youtube isn't a malicious site (at least not in the way this error message implies :P) But how do I fix it so I can use the site again?
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I tried everything in this article and nothing changed. It suggested using Windows Defender instead of third party security software, but I already use defender.
Oh I should have mentioned before, the error code is SEC_ERROR_UNKNOWN_ISSUER
Can you click the Advanced button? Is there any certificate shown? Can you paste it here?
Peer’s Certificate issuer is not recognized.
HTTP Strict Transport Security: true HTTP Public Key Pinning: true
MIIDXTCCAsqgAwIBAgIQzZYCSGiRUZlFWiwD3yiDwTAJBgUrDgMCHQUAMIGLMSsw KQYDVQQLEyJDcmVhdGVkIGJ5IGh0dHA6Ly93d3cuZmlkZGxlcjIuY29tMSEwHwYD VQQKHhgARABPAF8ATgBPAFQAXwBUAFIAVQBTAFQxOTA3BgNVBAMeMABEAE8AXwBO AE8AVABfAFQAUgBVAFMAVABfAEYAaQBkAGQAbABlAHIAUgBvAG8AdDAeFw0xNTAx MDEwNTAwMDBaFw0yNjAxMDEwNDU5NTlaMGoxKzApBgNVBAsTIkNyZWF0ZWQgYnkg aHR0cDovL3d3dy5maWRkbGVyMi5jb20xITAfBgNVBAoeGABEAE8AXwBOAE8AVABf AFQAUgBVAFMAVDEYMBYGA1UEAxMPd3d3LnlvdXR1YmUuY29tMIGfMA0GCSqGSIb3 DQEBAQUAA4GNADCBiQKBgQCjZmppG+teQbrzFdeY2od+wJjMl1675H3J9VOizTBn G6w8ib6Od9zgAJq7aKMuGjz/zWgzeJoGLSbYxtLnEH1Qv5RwzSf6LngO9huhUfkK pR4RT/Ps3NyCfGninLyNYOLqQl9Jq+TfqblrHnwPf+WmBxJK/rG7dezni7TNhMMy vQIDAQABo4HpMIHmMAwGA1UdEwEB/wQCMAAwEwYDVR0lBAwwCgYIKwYBBQUHAwEw gcAGA1UdAQSBuDCBtYAQizACdLcX1cpJWiYYKRd7SKGBjjCBizErMCkGA1UECxMi Q3JlYXRlZCBieSBodHRwOi8vd3d3LmZpZGRsZXIyLmNvbTEhMB8GA1UECh4YAEQA TwBfAE4ATwBUAF8AVABSAFUAUwBUMTkwNwYDVQQDHjAARABPAF8ATgBPAFQAXwBU AFIAVQBTAFQAXwBGAGkAZABkAGwAZQByAFIAbwBvAHSCEKh9q2GwS5mkSztVTcOf 4gwwCQYFKw4DAh0FAAOBgQBFQiu0biof3dT6LPGGK6z3K9v7qmfnQAYZE+R2v0Cz 9GY1mKy8nAqkePnyny8SgHhFD/UTWEmnWxqZ+gOcm4z+F9Pjc0Vwm9pT3TT05K6a dtRTAowN117wNYJNMMIT785bWC/bZOL5GW9as+J3Ks+pi1ri8m/D4TU3j6BQFZ+D Og==
As you can see in the second screenshot, the certificate is issued by Fiddler
- Issuer: OU=Created by http://www.fiddler2.com, O=, CN=
So you need to check this software on your computer and possibly disable or uninstall it.
Disable or uninstall what software? I don't have fiddler installed on my computer.
You must have Fiddler installed somehow, otherwise Firefox won't see a certificate isued by Fiddler.
You can check the connection settings.
- Options/Preferences -> General -> Network: Connection -> Settings
If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.
See "Firefox connection settings":
I searched for fiddler on my computer and found nothing. Then I manually went through my folders just to see if it was hiding somewhere. I didn't find it that way either, but I did find this one file called FiddlerCore.dll in a folder within Program Files. Otherwise nothing.
What about proxy? Did you also search the system certificate store?
I just looked there, found these: