If you are a user of Facebook and also have an account on Google (e.g. Gmail) or Yahoo!, there’s good news for you. You can now link your Google account as well as your Yahoo! ID with Facebook. The advantage is that if you are signed into any of these services, you’ll automatically be logged into your Facebook account as well.
How it works
For example, if you are writing an email in Gmail or working on a spreadsheet in Google Docs, you can open the Facebook website in another browser tab and it won’t show you the sign-in screen anymore as it can use the login information from the Google Account where you are already logged in.
To set up this association between Facebook and your Yahoo!/Google accounts, just open the Facebook site and go to Settings > Accounts Settings. Now click the “Add a new linked account” in the drop-down and link all your accounts one by one.
You can link Google, Yahoo!, MySpace and OpenID with your Facebook account.
Amit Agarwal writes a technology blog at http://digitalinspiration.com/