Seen Blocker for Facebook™

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

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

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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.

Add-on Privacy & Security Communication

By:

Morni

Daily users:

583 -5

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 Browser Add-ons

Data ingested on:

2025-07-11

Ranking

# 4,143 ▼ 20

Other rankings

#18 in facebook keyword 55 ▲ 1

#63 in messages keyword 21 ▲ 1

#84 in fact keyword 12 ▼ 1

#88 in message keyword 23

#105 in ad blocker keyword 95

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Top 10 Facebook Chrome Extensions for 2025

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 ›

Extension safety

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 Browser Add-ons, 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 **** ********* *** **** **** *******

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