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 making use of a Yahoo!, Facebook, or Google ID.
Yahoo Sign In With Facebook
Login to Yahoo Mail account on PC/Desktop computer
First you require a username and password; currently open web browser from your computer/desktop. Then open page www.yahoomail.com on it. To start their brand-new "one-click" sign-in simply click on the "Sign in with: Facebook" symbol on the Yahoo! login screen. That's all you require; to get access of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer system
If you are an individual of Mac computer system then Safari must be your internet browser. Safari is the most effective surfing option for Mac OS; Safari is quick, faster as well as easy to use internet browser. You could easily access your Yahoo Mail account with it. See, how to login with Yahoo mail account on Safari web browser. Merely open Safari and also kind www.yahoomail.com; you will be guided to Yahoo mail sign-in web page. To launch their brand-new "one-click" sign-in merely click the "Sign in with: Facebook". You are then fully signed into Yahoo!
Nevertheless, an advice- you still will not have the ability to authorize into a mobile or desktop customer utilizing Google OpenID.
I wish this short article could aid you. Thanks ...