A quote from their blog: From Yahoo!'s point of view, any signed-in user engaging with Yahoo! solutions is a valued individual, whether she validates making use of a Yahoo!, Facebook, or Google ID.
Sign In Yahoo Mail Through Facebook
Login to Yahoo Mail account on PC/Desktop computer system
First you require a username and also password; currently open internet internet browser from your computer/desktop. After that open web page www.yahoomail.com on it. To launch their brand-new "one-click" sign-in just click on the "Sign in with: Facebook" symbol on the Yahoo! login display. That's all you need; to obtain access of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer
If you are a user of Mac computer system then Safari must be your internet internet browser. Safari is the very best surfing option for Mac OS; Safari is quick, quicker as well as easy to use internet browser. You could quickly access your Yahoo Mail account with it. See, how you can login with Yahoo mail account on Safari web browser. Merely open Safari as well as type www.yahoomail.com; you will be directed to Yahoo mail sign-in web page. To initiate their new "one-click" sign-in simply click on the "Sign in with: Facebook". You are then totally signed right into Yahoo!
Nonetheless, an advice- you still won't have the ability to sign right into a mobile or desktop computer client making use of Google OpenID.
I wish this article can assist you. Thanks ...