uBlock Origin

Name: uBlock Origin
Rating: 4.7973 (20482 reviews)
Author: Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

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uBlock Origin is not just an ad blocker; it's a comprehensive wide-spectrum content blocker designed for efficiency in CPU and memory usage. From the moment you install it, uBlock Origin blocks ads, trackers, coin miners, popups, and malicious URLs by leveraging a variety of pre-enabled filter lists such as EasyList, EasyPrivacy, and Peter Lowe’s Ad server list.

Users can further customize their blocking experience by selecting from additional filter lists, including EasyList Cookie, Fanboy Annoyances, and AdGuard Annoyances. Advanced features allow you to block JavaScript locally or globally and create custom rules to tailor the blocking to your needs. As a free, open-source project under GPLv3, uBlock Origin empowers users to take control of their browsing experience with a reliable, resource-efficient tool supported by a dedicated community.

Add-on Privacy & Security Productivity Utilities

By:

Raymond Hill

Daily users:

8,116,976 -349,659

Rating:

4.80

(20,482) 61 new ratings

Version:

1.64.0 Last updated: 2025-06-16

Version code:

5948100

Creation date:

2015-04-25

Risk:

Permissions:

alarms
dns
menus
privacy
storage
tabs
unlimitedStorage
webNavigation
webRequest
webRequestBlocking

Size:

3.88MB

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Browser Add-ons

Updated:

21 hours ago

Ranking

# 1

Other rankings

#1 in Privacy & Security

#1 in block ads keyword 96

#1 in blog keyword 3

#1 in memory keyword 13

#1 in mock keyword 19

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User reviews

Users praise uBlock Origin for its strong ad-blocking capabilities and consider it one of the best add-ons for a cleaner browsing experience. However, multiple users report issues with its effectiveness on platforms like YouTube and Twitch, where ads are no longer blocked, leading to reduced satisfaction. Additionally, sponsored ads on Facebook remain unblocked. While it previously earned high ratings, recent failures on popular streaming and social platforms have caused users to lower their ratings and express frustration.

Pros

Effectively blocks most ads and pop-ups enhancing browsing experience
Highly regarded and considered a top ad blocker by users
Previously worked well on YouTube and other sites

Cons

Currently does not block ads on YouTube effectively
Fails to block ads on Twitch
Unable to remove sponsored ads on Facebook

Recent reviews

by Ja*****, 2025-06-17

by E.*****, 2025-06-17

by Be*****, 2025-06-17

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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.

uBlock Origin 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.
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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 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.

uBlock Origin has earned a fairly good reputation and likely can be trusted.

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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