Multiple Facebook accounts at a time

Mostly people share there computer or laptop  and both of them want to use facebook. but when they open a new tab to open a new account they observe that previous account is open. So, i am telling you that how to open multiple accounts at a time on single pc.
That's so simple. just press Ctrl+shift+N
And you  you will see that a private window will open.

 Open facebook.com and Log in . Now you can open 2 acounts. Similarly if you want to open more than two accounts simultaneously then use multiple browsers and open Private windows to open multiple acounts.