A quote from their blog: From Yahoo!'s perspective, any type of signed-in user engaging with Yahoo! services is a valued user, whether she validates utilizing a Yahoo!, Facebook, or Google ID.
How To Open Yahoo Mail Using Facebook
Login to Yahoo Mail account on PC/Desktop computer system
First you need a username as well as password; currently open web browser from your computer/desktop. After that open web page www.yahoomail.com on it. To initiate their brand-new "one-click" sign-in just click on the "Sign in with: Facebook" icon on the Yahoo! login display. That's all you need; to get accessibility of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer system
If you are a customer of Mac computer system then Safari must be your web internet browser. Safari is the very best browsing option for Mac OS; Safari is quick, much faster as well as easy to use browser. You can easily access your Yahoo Mail account with it. See, ways to login with Yahoo mail account on Safari internet browser. Just open Safari as well as type www.yahoomail.com; you will be guided to Yahoo mail sign-in web page. To launch their new "one-click" sign-in simply click the "Sign in with: Facebook". You are after that fully authorized into Yahoo!
Nonetheless, a word to the wise- you still will not be able to authorize right into a mobile or desktop computer client making use of Google OpenID.
I wish this post can aid you. Thanks ...