FactScope

Name: FactScope
Author: FactScope

One click tells you if a YouTube video is Real, Fake, Mixed, or a Story — AI checks claims against live web sources. Your first 2 checks are free, no sign-up needed.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-09-15

Version:

2.5.1

Last updated: 2026-09-03

Features & Capabilities

Ever wonder if a viral YouTube video is actually true? FactScope tells you in one click. Your first 2 checks are free, no sign-up needed.

Click the FactScope icon on any YouTube video and a side panel slides in with the URL pre-filled — just press Analyze. You'll also see an inline FactScope badge right under the video title: if the video was checked before, the verdict shows instantly and for free.

The AI reads the video's transcript, extracts the key factual claims, cross-checks them against live web search, and returns: • A clear verdict — Real, Fake, Mixed, or Story • A confidence percentage • Plain-English reasoning • The specific claims it flagged • The sources it used

Your first 2 checks are free with no sign-up. After that you can grab credits on the web app — repeat checks of the same video are always free.

Not affiliated with YouTube or Google. FactScope uses AI and can be wrong — always verify important claims yourself.

User Growth & Download Statistics

Add-on

By:

FactScope

Daily users:

Version:

2.5.1 Last updated: 2026-09-03

Version code:

6459924

Creation date:

2026-08-26

Firefox add-on GUID:

factscope@emergent.sh

Firefox add-on numeric ID:

3060955

Firefox on Android:

Risk:

Permissions:

Host permissions:

https://www.youtube.com/*
https://m.youtube.com/*
https://video-verify-ai-11.emergent.host/*
https://fact-scope.com/*

Content scripts matches:

www.youtube.com
m.youtube.com
fact-scope.com
www.fact-scope.com

Size:

41.40KB

Email:

Ap*****@proton.me

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-15

Compare stats and ranking:

Ranking

# 145,576 ▼ 22,496

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:

FactScope

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/factscope/

Email:

Ap*****@proton.me

Website:

https://fact-scope.com/

Permission Change History

2026-09-04: Version 2.3.1 → 2.5.1

Add Permissions: storage

Is FactScope 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.

FactScope 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.
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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.

FactScope 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.
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