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can not open yahoo mail in latest firefox version

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I have version 40.0.2 firefox and I can not open my yahoo mail I get this message Secure Connection Failed I have cleared cache and cookies and have uninstalled and reinstalled firefox. I can open yahoo mail in all other browsers. What can i do to fix this?

I have version 40.0.2 firefox and I can not open my yahoo mail I get this message Secure Connection Failed I have cleared cache and cookies and have uninstalled and reinstalled firefox. I can open yahoo mail in all other browsers. What can i do to fix this?

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Is Yahoo mail the only site that gives you a certificate error? if this is occurring on many different sites, we'll suggest some diagnostics to try to run that down.

Does it make any difference if you access mail through this general domain: mail.yahoo.com instead of your regular approach?

One thing that seems to be affecting a lot of Windows 10 users is that parental controls are being applied to their accounts, which causes seemingly random blockages. Could you check Microsoft Family Safety and either disable it or take your account out of the family: http://windows.microsoft.com/en-us/windows-10/turn-off-microsoft-family-settings