Facebook is a social networking site that allows friends to connect with one another through various features, including chat. Facebook chat allows other users to see when you are online and available to interact. If you wish to keep friends from knowing when you are logged into Facebook, you can do so by signing out of Facebook chat.
Sign in to your Facebook account.
Navigate to and click the "Chat" window in the bottom right corner of the screen.
Click the "Options" tab.
Select "Go Offline" from the drop-down menu to change your status from available to offline.
Sign in to your Facebook account.
Navigate to and click the "Chat" window in the bottom right corner of the screen.
Click the "Options" tab.
Select "Go Offline" from the drop-down menu to change your status from available to offline.