UltraBlock - Ultimate AdBlocker

Name: UltraBlock - Ultimate AdBlocker
Author: arena tech

Pro AdBlocker - YouTube no ads, popup blocker, cookie banner blocker, element picker, crypto miner blocker, Twitch/Facebook ads, whitelist, custom filters, tracker protection.

Overview

Firefox Add-ons Store

Daily users

6 ▲ 1

Data as of 2026-08-18

Version:

3.0.0

Last updated: 2026-08-06

Features & Capabilities

UltraBlock Pro - The Ultimate Lightweight AdBlocker for Firefox

Tired of unskippable YouTube ads, annoying popups, cookie banners, and sponsored posts? UltraBlock Pro removes them all - instantly.

55KB, 0 trackers, 0 data collection, 100% local blocking. Built for Manifest V2 power that Chrome extensions can never match.

▶ YOUTUBE - 100% AD-FREE (4-Layer Engine) Other adblockers fail when YouTube updates. We use 4 layers so you never see an ad:

Network Block: Cancels youtube.com/api/stats/ads, doubleclick.net, googlesyndication.com before they load API Interception: Intercepts youtubei/v1/player JSON and strips adPlacements[], playerAds[], adBreaks[] - player never sees ads Auto-Skip: 400ms loop detects .ad-showing and seeks video to end + auto-clicks Skip button - no 5 sec wait Cosmetic: Removes ytd-ad-slot-renderer, #masthead-ad, sponsored feed items Result: No pre-roll, mid-roll, post-roll, overlay, banner, in-feed Sponsored, Shorts ads. Video starts instantly.

Pro YouTube Extras:

Press S to skip sponsor segments (+10s) - SponsorBlock-like Hide YouTube Shorts shelf & sidebar Hide Mixes & auto-playlists Auto HD - forces highest quality Cleans ?si= tracking from shared YouTube links 🛡 BLOCKS EVERYTHING, EVERYWHERE Ads: Google Ads, DoubleClick, Taboola, Outbrain, 100+ networks Video & Audio Ads: SpotX, Teads, FreeWheel, JWPlayer Popups & Popunders: Advanced window.open blocker - only allows popups after real user click (1.5s gesture check). Blocks popads, propellerads, adsterra Banners, Image, Text, Sticky, Floating Ads: 500+ cosmetic filters + MutationObserver Facebook, Instagram, Twitch, TikTok: Hides Sponsored posts, promoted reels, ad overlays Trackers: Google Analytics, Facebook Pixel, Hotjar, Mixpanel, Clarity Crypto Miners: CoinHive, CryptoLoot, CoinImp, WebMinePool Fingerprinting & Canvas Tracking Tracking URLs: Auto-removes utm_source, fbclid, gclid, igshid - you copy clean links 🍪 COOKIE BANNER AUTO-BLOCKER (NEW) Blocks OneTrust, CookieBot, Usercentrics, Didomi, TrustE, Quantcast (50+ selectors). Auto-clicks "Reject All / Necessary Only" and fixes scroll lock. Popup has "Clear Banners" button.

🎯 ELEMENT PICKER - BLOCK ANYTHING FOREVER (NEW) Annoying newsletter, sticky header, chat widget, or ad that slipped through?

Press Ctrl+Shift+E or Right-click → Pick element to block Hover - red overlay shows exact element + selector Click - hidden permanently on that domain forever Manage in Dashboard → Custom Filters 🤍 WHITELIST PER SITE (NEW) Support your favorite creator or site breaks?

Click icon → Whitelist Site Right-click → Disable on this site Keyboard Ctrl+Shift+B Manage all whitelisted domains in Dashboard 📊 PRO DASHBOARD & PRIVACY FIRST Options page with stats: Total blocked, Data saved (MB), Time saved, Trackers blocked Tabs: General, YouTube Pro, Whitelist, Custom Filters, Advanced, About Custom filter editor: Add selector@domain like #annoying-popup@news.com Export/Import backup as JSON - share filter sets with friends Context menus + shortcuts: Ctrl+Shift+U/E/B Why UltraBlock is faster & better than uBlock Origin / AdGuard:

YouTube API stripping is unique - not just cosmetic hiding Built-in element picker with permanent storage per domain (no extra extension) Cookie banner auto-reject, not just hide URL cleaner - others don't clean tracking params 55KB vs 5MB+ - loads instantly, <1% CPU, pages load 30-50% faster No external filter list download - all built-in, works offline⌨ SHORTCUTS Ctrl+Shift+U: Open popup Ctrl+Shift+B: Toggle current site whitelist Ctrl+Shift+E: Element picker S (on YouTube): Skip 10s sponsor segment 🆕 What's new in v2.0? Whitelist per site + site status in popup Element picker with visual overlay & permanent storage Cookie banner blocker (50+ patterns) + auto Reject All Tracker, crypto miner, fingerprinting blocker Social ads blocker (FB/IG/Twitch/TikTok) YouTube: Sponsor skip S key, hide Shorts/Mixes, Auto HD, ?si cleaner URL tracker cleaner (utm_, fbclid) Full Dashboard with Export/Import, Custom Filters editor Data saved & time saved stats Install now and experience the clean, fast web you deserve. YouTube starts instantly, news sites without clutter, no popups, no cookie nagging.

Support: Open Dashboard → Support or GitHub issues.

User Growth & Download Statistics

Add-on

By:

arena tech

Daily users:

6 1

Version:

3.0.0 Last updated: 2026-08-06

Version code:

6398391

Creation date:

2026-07-31

Risk:

Permissions:

Content scripts matches:

<all_urls>
*.youtube.com
youtube.com
*.youtu.be
youtu.be
*.youtube-nocookie.com
*.twitch.tv
*.facebook.com
*.instagram.com
*.tiktok.com

Size:

84.45KB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-08-18

Compare stats and ranking:

Ranking

# 40,505 ▲ 3,193

Other rankings

#188 in adblocker keyword 92 ▲ 23#231 in adblock keyword 92 ▲

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:

arena tech

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/ultrablock-ultimate-adblocker/

Is UltraBlock - Ultimate AdBlocker 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.

UltraBlock - Ultimate AdBlocker requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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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.

UltraBlock - Ultimate AdBlocker 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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