See Who's Snooping In Your Account

Someone might be logged into your Facebook account without your permission, and they have full control over your messages, pictures, posts and your account as a whole. The funniest part is you can also be logged in and doesn't change anything about your profile.
 To identify who is snooping in your account, Follow these step by step guide:



See Who's Snooping In Your Account

• First log into your facebook account

• Locate the settings icon and go to settings page

• From your settings page, under the Security folder, you'll see the link "Where You're Logged In."

• Here you will find all your active Facebook log-ins from desktop, mobile or any other device presently used to log into your account.

 It will (usually) provide information on the location, browser being used, and device. From here you can have an insight to who’s presenting in your account and if something seems fishy and you don’t wish to risk your details and other personal things, then you have to "end activity" from individual or all devices.

Note that this also comes in handy, and might be as a result of you using your friend's computer to access your account or you accessed your Facebook on some public laptop, and forgot to log out.
You need not fret though as you have the ability to completely log out from all devices your account is currently logged into. For detailed information about how to log out from your account you can read this article on How Do I Log Out of My Account.
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