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If you see secure connection errors on multiple secure websites, updating your security product or modifying its settings may resolve the issue.

This can produce connection errors or warnings on secure websites. Many security products use a feature that intercepts secure connections by default. Other websites may require HTTP Strict Transport Security (HSTS) and will not allow access with an insecure connection. Note: The option to enable TLS 1.0 and 1.1 has been removed from the error page in Firefox version 97.

For more information, see this Mozilla blog post. Websites that don't support TLS version 1.2 or higher will display a Secure Connection Failed error page with Error code: SSL_ERROR_UNSUPPORTED_VERSION and a message that says, This website might not support the TLS 1.2 protocol, which is the minimum version supported by Firefox. Since Firefox version 78, the minimum TLS version allowed by default is TLS 1.2. Contact the owners of the website and ask them to update their TLS version to a version that is still current and still secure. Firefox protects you by preventing navigation to such sites if there is a problem in securely establishing a connection. Some websites try using outdated (no longer secure) Transport Layer Security ( TLS) mechanisms in an attempt to secure your connection. There is no option to add a security exception to visit the website. The error page will include a description of the potential security threat and an Advanced… button to view the error code and other technical details.

Please contact the website owners to inform them of this problem.ĭid Not Connect: Potential Security IssueĬertain secure connection failures will result in a Did Not Connect: Potential Security Issue error page.

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.

The error page will also include the following information: There is no option to add a security exception to bypass this type of error. If Firefox cannot establish a secure connection, it will display a Secure Connection Failed or Did Not Connect: Potential Security Issue error page.Ī Secure Connection Failed error page will include a description of the error and a Try Again button. When a website that requires a secure ( HTTPS) connection tries to secure communication with your computer, Firefox cross-checks this attempt to make sure that the website certificate and the connection method are actually secure.

1.2 Did Not Connect: Potential Security Issue.

1 Secure connection cannot be established.