To log out of any of them, click “end activity”. It follows the news of a Sydney mother-of-three, her daughter and daughter’s friends being subjected to a two-week ordeal at the hands of a Facebook stalker they have been unable to get the social networking company to do anything about. Facebook said it was making the service available over the next couple of weeks, accessible on computers, but not mobile devices. There, it will show where else the Facebook account is logged in, including the type of device and the city it’s in or near. The feature is similar to the feature Google’s Gmail offers its users, and Facebook said it would help users keep their logins secure. To access the feature, users should go to “account settings” on their Facebook page and click on “change” next to “account security”. AP and Facebook is rolling out a new security feature that lets users log out of their accounts remotely from another computer.