The secure connection feature on Mozilla Firefox makes sure that the website certificate and the connection method are secure when you are attempting to access a site. If the web browser identifies an issue and if Mozilla cannot establish a secure connection, you will see an error message. The secure connection failed error could be the result of unsupported TLS version or incorrect system date. Since there could be different reasons why the error occurred, you should call the Mozilla support number to implement the correct solution. The support number is available at all 24 hours to help you in fixing the web browser issue.
Read more: - https://www.customerhelpsupport.com/mozilla-firefox-support-number/