Stealth Sponsor Firefox

Stealth Sponsor

By: FATAL
Sponsor detection for IN video sponsors, block YouTube ads and unlock YouTube Premium with more features, including features outside of YouTube and on other platforms too.

Features & Capabilities

Stealth Sponsor is a paid extension. A license or subscription is required. Plans, pricing, and account access are at https://stealth.online

Stealth Sponsor gives you a cleaner YouTube experience with sponsor skipping, ad handling, transcript tools, PiP, filters, and extra playback controls. It is built for people who want YouTube to feel more premium, less interrupted, and more useful.

Features:

• AI sponsor detection and auto-skip • SponsorBlock support • Aggressive Mode for self-promo, filler, merch plugs, reminders, and other non-content interruptions • Skip intros • Skip intro recaps and opening buildup before the real content starts • Timeline markers for detected segments • Segment Finder in the widget • Transcript viewer • Copy transcript text • reEdit panel for follow-up analysis and transcript-based questions • Cached transcripts and cached analysis for faster rescans • Use Stealth AI with subscription • Or use your own OpenAI API key • Or use a local Ollama model • GPT 5.4/5+ and custom model support • Custom sponsor detection instructions • Custom Aggressive Mode instructions • Temperature control • Reasoning effort control • Verbosity control • Sponsor safelist so selected brands or keywords are never skipped • Scan threshold so short videos can be ignored • YouTube ad skip • YouTube ad mute and fast-forward handling • YouTube TV ad skip • Auto Best Quality on YouTube • YouTube PiP button • YouTube Shorts PiP • YouTube Shorts auto-scroll widget • Advanced YouTube filters on Home, Search, and Subscriptions • Filter by minimum views • Filter by max age • Block channels • Filter by title keywords • Layout controls • Stealth Theme for a cleaner YouTube layout • Audio normalizer with adjustable compression • External Mode for non-YouTube video sites • External site PiP • Amazon Prime Video ad skip • Tubi ad skip • Peacock ad skip • Twitch ad skip with a clean screen during ad breaks • Transcript detection on supported external sites like Tubi, Pluto TV, and Peacock • Optional Facebook sponsored post blocking

If you want YouTube to feel faster, cleaner, and less interrupted, Stealth Sponsor does that, and it adds a lot more on top.

User Growth & Download Statistics

Manifest V3 Add-on
By:
FATAL
Daily users:
1 -1
Rating:
5.00
(1)
Version:
0.3.8 Last updated: 2026-05-03
Version code:
6244811
Creation date:
2026-04-27
Risk:
Very high risk impact High risk likelihood
Permissions:
Host permissions:
  • <all_urls>
  • https://nexus.stealth.online/*
  • https://api.openai.com/*
  • https://api.ipify.org/*
  • https://sponsor.ajay.app/*
  • https://googleads.g.doubleclick.net/*
  • https://*.youtube.com/*
  • https://www.youtube.com/*
Content scripts matches:
  • *.youtube.com
  • *.facebook.com
  • <all_urls>
Size:
1.28MB
Email:
su*****@fvtal.com
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-17
Compare stats and ranking:

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:
FATAL
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/stealth-sponsor/
Email:
su*****@fvtal.com
Website:
https://stealth.online/docs/#p=support-tickets

User Reviews

This is just what I was looking for omg
by Th*****, 2026-05-01
View all user reviews ›

Is Stealth Sponsor 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.

Stealth Sponsor 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 ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
  • Critical ******* ****** ** *** ********* ******** ************ ************* *************** *********** ********** ********* ***************
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
  • Medium ****** ********** ** ******** ********** *** ********* ******* ******** ****** ******** ****** ********
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.

Stealth Sponsor 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 has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
  • Good **** ********* *** **** **** *******
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