A quote from their blog: From Yahoo!'s perspective, any kind of signed-in customer involving with Yahoo! solutions is a valued user, whether she confirms utilizing a Yahoo!, Facebook, or Google ID.
Yahoo Mail Sign In With Facebook Account
Login to Yahoo Mail account on PC/Desktop computer
First you need a username and password; now open internet browser from your computer/desktop. Then open page www.yahoomail.com on it. To initiate their brand-new "one-click" sign-in just click the "Sign in with: Facebook" symbol on the Yahoo! login screen. 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 after that Safari have to be your internet internet browser. Safari is the most effective surfing remedy for Mac OS; Safari fasts, quicker and also easy to use browser. You could quickly access your Yahoo Mail account with it. See, how to login with Yahoo mail account on Safari web browser. Simply open Safari as well as kind www.yahoomail.com; you will certainly be directed 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 after that fully authorized into Yahoo!
However, a suggestion- you still won't be able to authorize into a mobile or desktop client making use of Google OpenID.
I hope this article can help you. Thank you ...