How to auto or remotely log out Gmail, Facebook?

Sharing computer has some drawbacks for Google and Facebook users who wanted to keep out their personal account from others. If a person forgot to log out their account, the next person who access the computer will has the ability to make manipulation to his/hers account. There are several ways you can log out your user account.


Method 1 - Auto Log Out Add-Ons 

You can use Add-Ons or Plug In to log out your Gmail or Facebook account even you can't reach the logout button. Here's the link to the Add-Ons

Gmail/Google Accounts Auto-Logout

Chrome

Firefox

Facebook Auto-Logout

Chrome
Firefox

Method 2 - Log Out Remotely
If you don't have the privilege to install software, you can remotely log out your account using last account activity. Here's how you can do it:

Gmail/Google Accounts
Step 1 - Log In to your Gmail account on any PC.

Step 2 - Scroll down at the bottom of the Gmail page and look for "Last account activity" then click on the  "Details".

Step 2 - If you did not log out from other PC, you will see the Concurrent Session Information. Click on the "Sign out all other sessions" to log out  from other sessions.

Facebook Accounts

Step 1 - Log In to your Facebook account on any PC.

Step 2 - Look at the top right of your Facebook page and click on the settings button.

Step 3 - Click "Security" on the left pane.

Step 4 - Find the Active Sessions and click edit located on the right of the text.

Step 5 - If you did not log out from other PC, you will see more than one Active Session. Click on the "End Activity" link if you want to end the session.