FB unseen is a Google Chrome add-on that disables the 'Seen' feature of recent Facebook chat window.
With FB unseen, your friends will no longer be able to see if you read their messages. However, you will still be able to see if they read your messages.
FB unseen is cross-platform and it works on Mac OS X, Windows and Linux.
· Google Chrome
· Facebook account
What's New in This Release: [ read full changelog ]
· Mark as read button sometimes showed up itself again, fixed that (wrong usage of localStorage)