Firefox No Likey Yahoo Mail

[George Tyndall]

Here is an image of the screen that I get.

trusted.JPG

Machine is OS7 64-bit

Suggestions other than "upgrade to Win10" please

[Steve Grisetti]

Switch to the Chrome browser.

[Bob]

This isn't an issue with Windows. It's a Firefox/Yahoo issue regarding the SSL certificates being used. Firefox is not recognizing Yahoo's certificate. Yahoo just renewed it's SSL certificate about a week ago, maybe you're getting a cached certificate. Have Firefox display the certificate and validate that it's showing that it was issued to mail.yahoo.com by Symantec Class 3 Secure Server CA - G4 and is valid from 6/24/2016 to 6/9/2018.

There was an issue with Firefox wanting to have a complete chain of Extended Validation (EV) certificates from the issuing server through all intermediate servers to the site certificate. If a standard (not an EV) certificate was used in a chain that started with an EV certificate, Firefox would assume it was a phished site and consider the site certificate invalid. I don't know if this is still the case (I don't use Firefox), but Yahoo does break the EV chain. Other browsers don't have an issue with this. If this is the case, Chrome or IE will handle it fine and not complain. If the EV certificate chain is unbroken, the address bar will highlight the SSL connection in green. If the chain is broken, there will be no highlight.

[Steve Grisetti]

Bob, is there nothing you don't know? You're amazing!

[Peru]

Bob, is there nothing you don't know?

I'll bet he doesn't know the answer to that.

[George Tyndall]

Switch to the Chrome browser.

I KNEW you would say that!

Your pic confirms,



However, I still not comfortable with using anything by Google.

[George Tyndall]

Have Firefox display the certificate and validate that it's showing that it was issued to mail.yahoo.com by Symantec Class 3 Secure Server CA - G4 and is valid from 6/24/2016 to 6/9/2018.

I'm clueless how to do that.

I'll continue with IE until you have time to clue me in.

[momoffduty]

I have no problems with Yahoo email with Firefox & Win 7.

[Bob]

I looked up some pages from the Mozilla support site that may help:

connection untrusted error message

refresh firefox and reset add-ons and settings

certificates and how to view them

The Yahoo certificate is valid but the message you get says the issuer is unknown. Another possibility is the certificate cache is corrupted -- a refresh/reset should correct that.

[George Tyndall]

Have Firefox display the certificate and validate that it's showing that it was issued to mail.yahoo.com by Symantec Class 3 Secure Server CA - G4 and is valid from 6/24/2016 to 6/9/2018.

Validity expires Jan 2017, so I granted the exception but Yahoo mail still not working.

[George Tyndall]

I looked up some pages from the Mozilla support site that may help:

connection untrusted error message

refresh firefox and reset add-ons and settings

certificates and how to view them

The Yahoo certificate is valid but the message you get says the issuer is unknown. Another possibility is the certificate cache is corrupted -- a refresh/reset should correct that.

The only difference is exp date Jan 2017 but granting the exception did not work. Here is what worked:

Uninstalling and then reinstalling Firefox.

Remaining problem is how to make Norton Identity Safe work the way it does with IE11 = flawlessly.

I'll update when I've solved the problem.

Thanks still once again for your help.

[George Tyndall]

I'll update when I've solved the problem.

UPDATE: That may take a while, as the current version of Firefox (47) does not support Norton Identity Safe.

[Kent Frost]

However, I still not comfortable with using anything by Google.

I have to ask....why so?