best porn blocker Firefox

best porn blocker

By: stop-it Add-on
Blocks adult content, phishing sites, scams, ads, and trackers automatically — no setup required. Free, open-source, and collects zero data. Works instantly on install. Ideal for families, schools, and shared devices.

Overview

Firefox Add-ons Store
Daily users
2
Data as of 2026-07-28
Version:
5.25
Last updated: 2026-07-16
Download
Ranking
#65,990 ▲
Overall
Top keyword rank
#73 ▲ 37
best vpn

Features & Capabilities

Stop-it is a reliable Chrome extension designed to block pornographic content, scams, malware, and other dangerous sites, ensuring a safer internet experience. Trusted by thousands, it offers seamless protection without user intervention, making it ideal for homes, schools, and public spaces. Founded by Leonardo Sedevcic in 1998 and regularly updated through 2020, Stop-it remains a top choice for parental control and online security.

With Stop-it, users can browse confidently without exposure to unethical or harmful websites. Its no-configuration approach provides peace of mind by automatically filtering out dangerous content and cyber threats, promoting safer digital environments for all ages.

User Growth & Download Statistics

Manifest V3 Add-on Privacy & Security Education
By:
stop-it
Daily users:
2
Version:
5.25 Last updated: 2026-07-16
Version code:
6357934
Creation date:
2026-06-16
Risk:
Very high risk impact High risk likelihood
Permissions:
Host permissions:
  • https://stop-it.be/*
  • *://*.google.com/*
  • *://*.bing.com/*
  • *://*.yahoo.com/*
  • *://*.duckduckgo.com/*
  • *://*.youtube.com/*
  • *://youtu.be/*
  • *://search.brave.com/*
  • *://*.qwant.com/*
  • *://*.yandex.com/*
    • See more
Content scripts matches:
  • *.google.com
  • *.bing.com
  • *.qwant.com
  • *.yahoo.com
  • *.duckduckgo.com
  • *.yandex.com
  • *.ecosia.org
  • *.baidu.com
  • *.youtube.com
  • youtu.be
    • See more
Size:
101.14KB
Email:
co*****@stop-it.be
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-07-28
Compare stats and ranking:

Ranking

# 65,990 ▲
Other rankings
#73 in best vpn keyword 65 ▲ 37#107 in best keyword 40 ▲ 51#211 in malware keyword 38 ▲

Other platforms

Chrome
(v)
- 0.00 (0)

For Developers

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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:
stop-it
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/stop-it/
Email:
co*****@stop-it.be
Website:
https://www.stop-it.be/

User Reviews

Users praise Stop‑it for reliably blocking adult content, enforcing SafeSearch, and being lightweight. Major complaints repeated across reviews: it blocks YouTube and other legitimate sites without a whitelist, lacks password protection (so children can disable it), and has inconsistent behavior for some users. Request for customization (site exceptions/whitelist) is a frequent theme.
Pros
  • Effectively blocks porn/NSFW content and filters search results
  • Enables or enforces Google SafeSearch (including in private browsing)
  • Works across languages and blocks foreign-language explicit searches
  • Lightweight and easy to install, low memory usage
Cons
  • Blocks YouTube videos and comment sections unexpectedly with no way to whitelist YouTube
  • No whitelist/customization to allow specific sites (e.g., gambling or trusted sites)
  • No password or lock — easy for users to disable the add‑on
  • Sometimes blocks legitimate non‑explicit sites (reports include Coinbase and other useful sites)
  • Inconsistent behavior for some users — a few report it doesn’t work at all
Recent reviews
blocks youtube videos for no reason. no way to whitelist youtube. i would give it 5 stars if it would just block explicit sites and let me watch youtube.
by Fi*****, 2025-09-03
I wanted it to be good, and I gave it a fair chance. But this extension is actual garbage. It randomly blocks YouTube videos for no reason and at other times it blocks the comment sections of YouTube videos. Why? None of these videos are even slightly explicit. Kept happening for months. And beyond that it blocks actually useful websites, that again, have 0% explicit ontent. Websites such as Coinbase.com are blocked by this app. I have confirmed this app was responsible for all the above- disable the extension and YouTube and Coinbase immediately start working. Do not use this extension.
by Fi*****, 2025-03-07
View all user reviews ›

Is best porn blocker 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.

best porn blocker requires a lot of sensitive permissions. 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 ****** ********* ** * ****** ******** ******** ********** * ******* ******* *****
  • 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.

best porn blocker is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
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