Facebook is gonna release new security feature that allows users can log out of their accounts remotely from another computer.
To do this, go to "account settings" on your Facebook page and click on "change" next to "account security." There, you'll see where else your Facebook account is logged in, including the type of device and the city it's in or near. To log out of any of them, click "end activity."
Facebook is gonna release this feature in next upcoming weeks. Be Secure & Happy Surfing!!!