Unseen 0.1.1-signed No Restart
Blocks sending your 'seen' status from being sent to the other party on Facebook messaging.
NOTE: If you open the other party's inbox, the 'seen' status will still be sent.
Source code can be found on https://github.com/tangrs/unseen-extension
This add-on has been preliminarily reviewed by Mozilla. Learn more
This add-on is not compatible with your version of Firefox because of the following: