How can I get to my yahoo mail?

no , what was the reply?

What do I need to do?

no, my problem is not solved! Is there a phone number I can contact?

No need to bump your question with four replies as that makes it harder to find it (i.e. the question is moved off the no-replies queue). It is possible that a website no longer supports your Firefox 78.15.0 version, the last Firefox version for your Mac OS X 10.13 platform. Firefox 78.15.0 ESR is the last version for Mac OS X 10.9/10.10/10.11, you will no longer receive updates. *https://support.mozilla.org/en-US/kb/firefox-mac-osx-users-esr See also: *https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean *https://support.mozilla.org/en-US/kb/secure-connection-failed-firefox-did-not-connect *https://support.mozilla.org/en-US/kb/troubleshoot-time-errors-secure-websites