The new tool enables users to read messages without the sender knowing that the messages have been 'seen'.
This nifty tool helps blindside your facebook friends whenever you read their messages and you don't want them to know.
Here's how to install the tool
How to install Facebook Unseen
1.Make sure you're using Google's Chrome browser
2.Download Facebook Unseen from the Chrome Web Store
3.Click on the icon
Take as long as you like to reply to Facebook messages