A quote from their blog site: From Yahoo!'s point of view, any type of signed-in individual involving with Yahoo! services is a valued customer, whether she confirms making use of a Yahoo!, Facebook, or Google ID.
Yahoo Mail Login Using Facebook
Login to Yahoo Mail account on PC/Desktop computer system
First you require a username and password; currently open web browser from your computer/desktop. Then open web page www.yahoomail.com on it. To initiate their new "one-click" sign-in just click on the "Sign in with: Facebook" symbol on the Yahoo! login display. That's all you require; to get gain access to of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer
If you are a customer of Mac computer system after that Safari have to be your web browser. Safari is the best surfing service for Mac OS; Safari is quick, much faster and easy to use browser. You can easily access your Yahoo Mail account with it. See, how to login with Yahoo mail account on Safari web browser. Simply open Safari and kind www.yahoomail.com; you will certainly be guided to Yahoo mail sign-in web page. To initiate their new "one-click" sign-in merely click the "Sign in with: Facebook". You are after that completely authorized right into Yahoo!
However, an advice- you still will not have the ability to sign into a mobile or desktop client using Google OpenID.
I hope this write-up could aid you. Thanks ...