How to Log Onto Facebook Undetected
Logging into Facebook can be time-consuming if your Facebook friends start instant message chats with you. By changing your Facebook chat status to "unavailable," you can log into Facebook without your friends knowing you are online, which prevents any friends from starting chats with you.
Sign into Facebook.
Click the "Settings" icon in the lower-right corner. The "Settings" icon is a small gear wheel.
Click "Available to Chat." The check mark next to the "Available to Chat" status will disappear. You will not be shown as available to chat on any of your friends' chat lists, so you can log into Facebook undetected.