
Seen Blocker for Facebook™
Facebook™ Seen Blocker allows you to read your Facebook messages without notifying the sender.

What is Seen Blocker for Facebook™?
Seen Blocker for Facebook™ is a Firefox add-on that allows users to read their Facebook messages without letting Facebook report seen status to the senders by disabling read receipts. The sender will not see the 'Seen' label when you read their messages. The add-on can be activated from the toolbar button and preserves its last activation status across sessions.

Stats
- storage
- tabs
- background
- webRequest
- webRequestBlocking
- *://www.facebook.com/ajax/mercury/change_read_status.php
- *://www.facebook.com/ajax/messaging/typ.php
Chrome-Stats Rank
Other platforms

Summary
Seen Blocker for Facebook™ allows you read your Facebook messages without letting Facebook from reporting your seen status to the sender by blocking the request. As a result your friends will not see the 'Seen' label when you read their messages. The extension can simply be activated from the toolbar button and it will preserve its last activation status across sessions.
FAQs: How can I activate the extension? Once this extension is installed, there's nothing really much you need to do. Just click on the toolbar button. When the the color turned to green, it will block specific web requests to disable read receipts from Facebook.
User reviews
User reviews summary
Pros
- Has always worked fine with Firefox on Windows
- Does what it says
- On Android 8.0, there's a 'Facebook™ Seen Blocker'
Cons
- Not working in 2023
- Doesn't work on new Facebook version
- Does not work on messenger.com
Most mentioned
- Not working in 2023
- Does not work on new Facebook version
- Does not work on messenger.com
Safety
Risk impact
Seen Blocker for Facebook™ may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.
Risk likelihood
Seen Blocker for Facebook™ has earned a fairly good reputation and likely can be trusted.