A quote from their blog: From Yahoo!'s viewpoint, any type of signed-in user engaging with Yahoo! services is a valued user, whether she validates using a Yahoo!, Facebook, or Google ID.
Yahoo Sign In Facebook
Login to Yahoo Mail account on PC/Desktop computer system
First you require a username as well as password; now open web 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" icon on the Yahoo! login screen. That's all you require; to obtain accessibility of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer system
If you are an individual of Mac computer then Safari must be your internet browser. Safari is the best surfing option for Mac OS; Safari is quick, quicker as well as easy to use browser. You can quickly access your Yahoo Mail account with it. See, ways to login with Yahoo mail account on Safari web browser. Simply open Safari and type www.yahoomail.com; you will certainly be routed to Yahoo mail sign-in page. To initiate their brand-new "one-click" sign-in just click on the "Sign in with: Facebook". You are then totally signed right into Yahoo!
Nonetheless, a suggestion- you still won't be able to sign into a mobile or desktop client utilizing Google OpenID.
I hope this article could aid you. Thanks ...