A quote from their blog: From Yahoo!'s perspective, any type of signed-in customer engaging with Yahoo! solutions is a valued user, whether she validates using a Yahoo!, Facebook, or Google ID.
How To Sign In Yahoo Using Facebook
Login to Yahoo Mail account on PC/Desktop computer system
First you require a username as well as password; currently open web internet browser from your computer/desktop. After that open web page www.yahoomail.com on it. To start their brand-new "one-click" sign-in merely click the "Sign in with: Facebook" icon on the Yahoo! login display. That's all you require; to obtain access of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer
If you are a customer of Mac computer after that Safari should be your web internet browser. Safari is the very best surfing remedy for Mac OS; Safari fasts, much faster and easy to use web browser. You can quickly access your Yahoo Mail account with it. See, how you can login with Yahoo mail account on Safari browser. Just open Safari and kind www.yahoomail.com; you will be guided to Yahoo mail sign-in web page. To initiate their brand-new "one-click" sign-in merely click on the "Sign in with: Facebook". You are then totally authorized right into Yahoo!
Nonetheless, a recommendation- you still will not have the ability to authorize right into a mobile or desktop computer client utilizing Google OpenID.
I wish this short article could assist you. Thank you ...