A error page pops up and I get the following:

You can’t add an exception to visit this site.

The certificate is only valid for the following names: *.safezone.mcafee.com, safezone.mcafee.com

When I try to sign onto G mail I get redirected URL to YouTube. I do not want to sign onto youtube. I do not have a account with youtube. I started getting this error about 3 months ago. I have used Firefox and Google for ages - no problems. Using Windows 11. No problems signing into Google Mail using Microsoft Edge or Chrome. In windows 11 not using proxy server. " automatically detect settings" in proxy settings is on, found in the proxy settings page. A error page pops up and I get the following: The URL of the pop up error message reads: https://accounts.youtube.com/accounts/SetSID?ssdc=1&sidt=ALWU2csEj2zpnizjrFGU3h9sNBNMtCvG4rtlKGP7g3eJ4xKhQO4U/EOyONt9IXvqALsn1cLSYza0iX7flqtYP4j4 coy5uhbPqr8lAUIs8JsN0K2yQi7pOMoNkOLJ%2B8l6RHdc5J7xKdZ5nveOBcU%2BA77TUTUtVkeujdhp672cGdTPnCCCLXlwFyqu%2Bv9cSY91kSk4kNF1hpoXJjSwdETffFF8Q6iT%2Bj0r xYrzTiO0j7T3rBpuHUp6Cf7RSD9MN3P1aNSTx3s27hhNd5xheyuYS8X0NPbMErMXecXDgT7EsdCi93Z5V4EwWoS70/vrD6Mdt8%2BabAvK0nt6aFdnizKrA3UJFOHH22kS4Zzni0BjikNi24 SXncaLKgs594Ful6g%2BUWYhDGXznFL2437g8tZnw/pL1LMdwRYG/XJx6ZbhmS9G5nBppfnF4dlNb1z4oKQwtnOQucw5MImHn7Dc4ADC2DgZtdMOTVeUvQ%3D%3D& continue=https://mail.google.com/mail/&tcc=1&ifkv=AWnogHfqStXCgyKf8fiIUn0S691FyRlapg4PIo0dOKpR6eiCvsguai0YJ2hX8EkK_h2C3_AjRC4r5w The error message reads: Did Not Connect: Potential Security Issue Firefox detected a potential security threat and did not continue to accounts.youtube.com because this website requires a secure connection. What can you do about it? accounts.youtube.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site. The issue is most likely with the website, and there is nothing you can do to resolve it. You can notify the website’s administrator about the problem. Websites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for accounts.youtube.com. The certificate is only valid for the following names: *.safezone.mcafee.com, safezone.mcafee.com Error code: SSL_ERROR_BAD_CERT_DOMAIN If I hit the "back" button on the error message Google Mail will open.