Seen Blocker for Facebook™

Name: Seen Blocker for Facebook™
Rating: 3.5806 (31 reviews)
Author: Morni

By: Morni

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

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Features & Capabilities

Seen Blocker for Facebook™ is a Chrome extension designed to enhance your privacy on Facebook Messenger. It allows you to read messages without marking them as "Seen," thus preventing the sender from knowing you've read their message. Simply activate the extension via the toolbar button—it turns green when enabled—and it will block Facebook's read receipt requests. Your privacy settings persist across browsing sessions, ensuring consistent control over your message visibility. This lightweight extension offers an easy and effective way to read Facebook messages discreetly without notifying others, making it ideal for users who prefer to manage their interactions privately.

User Growth & Download Statistics

Add-on Privacy & Security Communication

By:

Morni

Daily users:

456 -10

Rating:

3.58

(31)

Version:

0.1.6resigned1 Last updated: 2024-04-25

Version code:

5726470

Creation date:

2015-02-22

Risk:

Permissions:

storage
tabs
background
webRequest
webRequestBlocking
*://www.facebook.com/ajax/mercury/change_read_status.php
*://www.facebook.com/ajax/messaging/typ.php

Size:

70.04KB

Email:

cl*****@yahoo.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-23

Compare stats and ranking:

Ranking

# 5,186 ▼ 30

Other rankings

#24 in facebook keyword 53

#87 in messages keyword 24 ▲ 1

#107 in fact keyword 9 ▼ 1

#112 in message keyword 30 ▲ 2

#133 in ad blocker keyword 96 ▼ 1

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For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Morni

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/facebook-seen-blocker/

Email:

cl*****@yahoo.com

Website:

https://github.com/cluclead/seen-blocker

User Reviews

Pros

Has always worked fine with Firefox on Windows previously
Does what it says
Some users found it nice and good

Cons

Not working as of March 2024
Does not work in the new Facebook version
Doesn't work on messenger.com
Hasn't worked for years

Recent reviews

by 全民*****, 2025-03-26

by 敬念*****, 2025-02-25

not working as of march 2024

by pp*****, 2024-03-04

View all user reviews ›

Is Seen Blocker for Facebook™ Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Seen Blocker for Facebook™ requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
Critical ******* ****** ** *** ********* ******** ************
High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Seen Blocker for Facebook™ has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******