A quote from their blog site: From Yahoo!'s viewpoint, any signed-in individual engaging with Yahoo! services is a valued user, whether she confirms making use of a Yahoo!, Facebook, or Google ID.
Sign In Yahoo Mail with Facebook Account
Login to Yahoo Mail account on PC/Desktop computer system
First you need a username as well as password; now open internet browser from your computer/desktop. Then open page www.yahoomail.com on it. To launch their brand-new "one-click" sign-in simply click the "Sign in with: Facebook" symbol on the Yahoo! login display. That's all you require; to obtain 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 need to be your web browser. Safari is the best browsing service for Mac OS; Safari is quick, quicker and easy to use browser. You can quickly access your Yahoo Mail account with it. See, how you can login with Yahoo mail account on Safari web browser. Simply open Safari and kind www.yahoomail.com; you will certainly be routed to Yahoo mail sign-in web page. To start their new "one-click" sign-in just click on the "Sign in with: Facebook". You are then totally authorized into Yahoo!
Nonetheless, an advice- you still will not have the ability to sign into a mobile or desktop computer client making use of Google OpenID.
I wish this write-up could help you. Thanks ...