Icon of SeenAt Block

SeenAt Block 1.0.1-signed

by Sediolina

IGNORE YOUR ENEMIES

When the lock is on, nobody knows you read messages on chat:
Stop showing people when you read their messages!
(Block "Seen At" in Facebook chat).

Visit www.seenatblock.com and www.facebook.com/seenatblock

This add-on has been preliminarily reviewed by Mozilla. Learn more