Facebook is one of the largest social networks in the world and consequently it provides lot of new features to its users. Facebook users can also chat with their friends in addition to posting statuses, photos and videos.
In facebook chat, "Last seen" is one of the major features which allows senders to know that if their message was read by the recipient or not. Sometimes it gives trouble to users who don't want their friends to know if they read the message. so here comes the solution:-
If you are using Google chrome as your standard browser, Please find the add-on "Facebook Unseen" in the given link and add it to your browser.
For firefox web browsers, you can find the add-on here https://addons.mozilla.org/en-us/firefox/addon/fbchatseenblocker
Once you installed the required add-on in your web browsers, you can read all your messages without letting your senders know if you read their messages. :-)
Please try it out and give us your feedback or comments in the section below.