This doesn't sound very promising: https://yahoohelpcommunity.tumblr.com/post/128229337217/hello-i-need-help-with-my-account-i-dont-see Anyway, it's something you would need to take up with Yahoo.

Also, your Firefox identified itself to the forum as version 40. An update is available: this article describes how to get Firefox 48.0 using the "About Firefox" dialog on the help menu: [[Update Firefox to the latest version]]. If something is holding you back from upgrading to Firefox 48, please let us know so we can suggest solutions or workarounds. Version 40 is not secure; Mozilla discloses [https://www.mozilla.org/security/known-vulnerabilities/firefox.html security flaws] after each new release. Sometimes Firefox reports the wrong version because that information was saved in a preferences file. If the "About Firefox" dialog (see first article link) shows Firefox 48.0, you may need to clear our that incorrect information. See: [[How to reset the default user agent on Firefox]].