www.facebook.com 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 imported. Error code: SEC_ERROR_UNKNOWN_ISSUER

https://www.facebook.com/ Peer’s Certificate issuer is not recognized. HTTP Strict Transport Security: true HTTP Public Key Pinning: true Certificate chain: -----BEGIN CERTIFICATE----- MIIDgTCCAmmgAwIBAgIRAJxcdaLeLSqloSQlhnilZ/8wDQYJKoZIhvcNAQELBQAw HjELMAkGA1UEBhMCRU4xDzANBgNVBAMMBlN0b3BBZDAeFw0xOTAxMjEwMDAwMDBa Fw0xOTA0MjExMjAwMDBaMGExCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJDQTETMBEG A1UEBxMKTWVubG8gUGFyazEXMBUGA1UEChMORmFjZWJvb2ssIEluYy4xFzAVBgNV BAMMDiouZmFjZWJvb2suY29tMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDd j/Vd+x20p0rRsYcjjnW1lEH4eguxolfti943Ez/Re1BO61XpGokydgKlLJ8cpPIj ZZW01TkPn6lVxPTynYiDY/AHCl1GJUIwGpyWNhNWlRTds3sTmZMtU4PzNkNTNAKz 2BMSwOct+WG+IsX7hXK33W4rQsKTdal+exlwRDwlVwIDAQABo4H6MIH3MIHHBgNV HREEgb8wgbyCDiouZmFjZWJvb2suY29tgg8qLm1lc3Nlbmdlci5jb22CDiouZmFj ZWJvb2submV0gg1tZXNzZW5nZXIuY29tggsqLmZic2J4LmNvbYIOKi54ei5mYmNk bi5uZXSCCyouZmJjZG4ubmV0ggZmYi5jb22CCCouZmIuY29tghAqLm0uZmFjZWJv b2suY29tggxmYWNlYm9vay5jb22CDioueHkuZmJjZG4ubmV0gg4qLnh4LmZiY2Ru Lm5ldDAMBgNVHRMBAf8EAjAAMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcD AjANBgkqhkiG9w0BAQsFAAOCAQEAnrFtHVDTkP+X2Uq+AWgle/flgakPjpcLNz/F 19O4a5SMHr0r6M8+A8zrycNCzPxU9QEXOP0piP5/2fwdNA6AqmLW55fzWXxlPBiW 8ZwqMz9B+Sbox114gY+A5vheM9YCAK9tKBxAerpRl06v7PgN2ylFnfJlOOWzoCOp Ua0r2mKqM01Bq2aLv4Cg2HbDummNo34AjpP65DH1Yy0stNVZCW0j9Tpt2F5l3rGX i/gn4LwL+8063rXQbSr93esH+lV6THg53X7Wu5akzYWllvH11KsJhbqeNVR466DW AA0rx7H8NVXRZ7j3lGItV0XEJVYAe4eSBrsOQBCwynJRXaKOSw== -----END CERTIFICATE-----

Regions bank came back and my default website but not youtube or facebook.

https://www.youtube.com/ Peer’s Certificate issuer is not recognized. HTTP Strict Transport Security: true HTTP Public Key Pinning: true Certificate chain: -----BEGIN CERTIFICATE----- MIIG0TCCBbmgAwIBAgIRAMd71ezQWwaxMZVT4sejx7kwDQYJKoZIhvcNAQELBQAw HjELMAkGA1UEBhMCRU4xDzANBgNVBAMMBlN0b3BBZDAeFw0xOTAxMjMwOTE1MDBa Fw0xOTA0MTcwOTE1MDBaMGYxCzAJBgNVBAYTAlVTMRMwEQYDVQQIDApDYWxpZm9y bmlhMRYwFAYDVQQHDA1Nb3VudGFpbiBWaWV3MRMwEQYDVQQKDApHb29nbGUgTExD MRUwEwYDVQQDDAwqLmdvb2dsZS5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJ AoGBAMERwMAhKFRj73Z3tdz+DlKxnYnEIbOUEHvfHHgj9DUfdzjIVQVE5rdM0PCj iXyA7VKwzEc3RkwfpAJ2QhEz0Ow7Fh3I9jFclqSy8cSscCj0V93oKgYmNxf+L2fC F2TVD5Uzf1nM8TtjJrXl7gU2Jq6H5Wk8e5s1aj6Ka42fiMrHAgMBAAGjggREMIIE QDCCBBkGA1UdEQSCBBAwggQMggwqLmdvb2dsZS5jb22CDSouYW5kcm9pZC5jb22C FiouYXBwZW5naW5lLmdvb2dsZS5jb22CEiouY2xvdWQuZ29vZ2xlLmNvbYIGKi5n LmNvgg4qLmdjcC5ndnQyLmNvbYIKKi5nZ3BodC5jboIWKi5nb29nbGUtYW5hbHl0 aWNzLmNvbYILKi5nb29nbGUuY2GCCyouZ29vZ2xlLmNsgg4qLmdvb2dsZS5jby5p boIOKi5nb29nbGUuY28uanCCDiouZ29vZ2xlLmNvLnVrgg8qLmdvb2dsZS5jb20u YXKCDyouZ29vZ2xlLmNvbS5hdYIPKi5nb29nbGUuY29tLmJygg8qLmdvb2dsZS5j b20uY2+CDyouZ29vZ2xlLmNvbS5teIIPKi5nb29nbGUuY29tLnRygg8qLmdvb2ds ZS5jb20udm6CCyouZ29vZ2xlLmRlggsqLmdvb2dsZS5lc4ILKi5nb29nbGUuZnKC CyouZ29vZ2xlLmh1ggsqLmdvb2dsZS5pdIILKi5nb29nbGUubmyCCyouZ29vZ2xl LnBsggsqLmdvb2dsZS5wdIISKi5nb29nbGVhZGFwaXMuY29tgg8qLmdvb2dsZWFw aXMuY26CFCouZ29vZ2xlY29tbWVyY2UuY29tghEqLmdvb2dsZXZpZGVvLmNvbYIM Ki5nc3RhdGljLmNugg0qLmdzdGF0aWMuY29tghIqLmdzdGF0aWNjbmFwcHMuY26C CiouZ3Z0MS5jb22CCiouZ3Z0Mi5jb22CFCoubWV0cmljLmdzdGF0aWMuY29tggwq LnVyY2hpbi5jb22CECoudXJsLmdvb2dsZS5jb22CFioueW91dHViZS1ub2Nvb2tp ZS5jb22CDSoueW91dHViZS5jb22CFioueW91dHViZWVkdWNhdGlvbi5jb22CESou eW91dHViZWtpZHMuY29tggcqLnl0LmJlggsqLnl0aW1nLmNvbYIaYW5kcm9pZC5j bGllbnRzLmdvb2dsZS5jb22CC2FuZHJvaWQuY29tghtkZXZlbG9wZXIuYW5kcm9p ZC5nb29nbGUuY26CHGRldmVsb3BlcnMuYW5kcm9pZC5nb29nbGUuY26CBGcuY2+C CGdncGh0LmNuggZnb28uZ2yCFGdvb2dsZS1hbmFseXRpY3MuY29tggpnb29nbGUu Y29tghJnb29nbGVjb21tZXJjZS5jb22CGHNvdXJjZS5hbmRyb2lkLmdvb2dsZS5j boIKdXJjaGluLmNvbYIKd3d3Lmdvby5nbIIIeW91dHUuYmWCC3lvdXR1YmUuY29t ghR5b3V0dWJlZWR1Y2F0aW9uLmNvbYIPeW91dHViZWtpZHMuY29tggV5dC5iZTAM BgNVHRMBAf8EAjAAMBMGA1UdJQQMMAoGCCsGAQUFBwMBMA0GCSqGSIb3DQEBCwUA A4IBAQBCKBW4dNFrwSiDSShbDbzmOCBnEWRgF+F4eHr1NgFT3Mpyj+fm+sC/zzH5 f06aExmiIXc6eRV3I9KcSFl5bIiNjSa+7BcivtCBQBCVghOs+WCK2ubT2wq5qJZB jHVfPnu2XXS4MYadh0OW8CrUqbjr4XH0wBTga7aRe4BaBZ1Fh791sRE5xh/GWl1z Lx4Ni3/m1i7e5tKiLhSmrOLSq66MlBT3ForMYPwLBOmJeoPxHRLfWyOQrGNeLR5c 2j8A1EyHPjvWvJHJepjiiyzgZvKvr5a0+fjwPXm5qiAohFKfTFZ6kvqtsB9ppAH2 FzJzp7KnZAGuJIjKbQA4WvbUO5xX -----END CERTIFICATE----

Ok so did you complete remove firefox and delete the mozilla folder before reinstalling?

The issuer of the certificates you posted for youtube and facebook is from StopAd

So do you have StopAd installed?

I uninstalled stop ad and uninstalled and reinstalled firefox. now I can get on the websites again but I still don't have sound on videos. I am going to restart the pc and see what if anything that does.

I didn't know anything about a mozilla folder so I didn't do anything about that. I did uninstall stop ad, uninstalled and reinstalled firefox again. Now could get onto websites but still no sound. Restarted pc and problem seems to be solved, videos have sound. Thank you for your help. When I call my nephew computer expert this pm, I will ask him about the folder and when and if I can put ad block back on my pc.