How To Automatically Log Out From Facebook After Certain Time

I know its happen to many people , suppose you are chatting with your friends in Facebook then you got a phone on somebody came in your door , you just leave your PC without log out from Facebook and you forget that you were chatting with your friends in Facebook.On the opposite site your friend become angry that you are not replying.If you have face this kind stuff then best is automatically log off from Facebook after a certain or fixed time if you forget to log out.So try this awesome trick

Step 1:Download and install this Firefox add on 

                        "Facebook auto log out"
Step 2:Default time to auto log out is 60 second , just change it just opening the add on by  Clicking firefox in the top left,then Add-ons, then options.

                                                                                                                                                                                                 

This tool also make you log out if you close the window in which you open Facebook.This simple tool is awesome to automatically log off from Facebook.

Enjoy..!!