A quote from their blog: From Yahoo!'s viewpoint, any kind of signed-in customer involving with Yahoo! services is a valued customer, whether she validates utilizing a Yahoo!, Facebook, or Google ID.
Yahoo Mail Sign In with Facebook Account
Login to Yahoo Mail account on PC/Desktop computer system
First you require a username as well as password; currently open web browser from your computer/desktop. Then open web page www.yahoomail.com on it. To initiate their brand-new "one-click" sign-in merely click on the "Sign in with: Facebook" icon on the Yahoo! login display. That's all you require; to obtain accessibility of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer system
If you are a user of Mac computer system then Safari have to be your web browser. Safari is the very best browsing solution for Mac OS; Safari fasts, quicker and also easy to use internet browser. You could easily access your Yahoo Mail account with it. See, ways to login with Yahoo mail account on Safari internet browser. Simply open Safari and type www.yahoomail.com; you will be directed to Yahoo mail sign-in page. To initiate their brand-new "one-click" sign-in just click the "Sign in with: Facebook". You are after that totally authorized into Yahoo!
However, a recommendation- you still will not have the ability to authorize right into a mobile or desktop client using Google OpenID.
I wish this article can aid you. Thanks ...