What happens in the above case is that you do not know where your logout button is located on Facebook. It happened to me for almost a year but I didn't bother finding out since I was the only using my system and so I didn't need to logout of my Facebook account.
How Do I Log out of My Facebook Account?
To log out from your current device that you are using to access Facebook, simply click on the V-like drop down and select "Logout" at the top right hand corner of your FB page - See the image below:That's all!
See also:
Advance Facebook Account Logout
To log out of FB on another computer, phone or tablet that you have used to access your FB account, you need to follow the steps given bellow.
- Go to your Security and Login Settings
- Click on the Where You're Logged In section
- Find the session you want to end and click End Activity
- Clicking End Activity will immediately log you off of Facebook on that computer, phone or tablet.