A quote from their blog: From Yahoo!'s point of view, any signed-in individual engaging with Yahoo! services is a valued individual, whether she verifies utilizing a Yahoo!, Facebook, or Google ID.
How to Login Yahoo with Facebook
Login to Yahoo Mail account on PC/Desktop computer system
First you need a username as well as password; currently open internet internet browser from your computer/desktop. After that open web page www.yahoomail.com on it. To start their brand-new "one-click" sign-in merely 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 then Safari need to be your internet internet browser. Safari is the best surfing solution for Mac OS; Safari fasts, much faster and also easy to use web browser. You could conveniently access your Yahoo Mail account with it. See, how you can login with Yahoo mail account on Safari web browser. Just open Safari as well as type www.yahoomail.com; you will certainly be routed to Yahoo mail sign-in web page. To launch their new "one-click" sign-in merely click on the "Sign in with: Facebook". You are after that completely signed right into Yahoo!
Nevertheless, a recommendation- you still won't be able to authorize into a mobile or desktop computer client making use of Google OpenID.
I wish this article can help you. Thanks ...