uBlock Origin

Name: uBlock Origin
Rating: 4.69031541407232 (34209 reviews)
Author: Raymond Hill (gorhill)

Finally, an efficient blocker. Easy on CPU and memory.

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uBlock Origin is a powerful, free, and open-source content blocker that efficiently filters out ads, trackers, malware, and web annoyances with minimal CPU and memory usage. Unlike typical ad blockers, it functions as a wide-spectrum content blocker, providing users with high customization options, including advanced filtering and local JavaScript blocking. It comes preloaded with popular filter lists like EasyList, EasyPrivacy, and Peter Lowe’s Ad server list, while also supporting additional lists and user-defined rules for tailored browsing protection. Perfect for users seeking both performance and comprehensive web filtering, uBlock Origin maintains transparency and quality through active community contributions and continuous updates.

As a GPLv3 licensed extension maintained by a dedicated community, uBlock Origin empowers users to browse the web securely and smoothly without unnecessary resource drain. Extensive documentation, changelog, and contributor information are available publicly on GitHub, underscoring the extension’s commitment to open development and user freedom.

Privacy & Security Productivity Developer Tools

By:

Raymond Hill (gorhill)

Users:

30,000,000+ 1000.00K

Rating:

4.69

(34,209) 20 new ratings

Version:

1.63.2 Last updated: 2025-03-21

Creation date:

2020-06-28

Risk:

Permissions:

alarms
contextMenus
privacy
storage
tabs
unlimitedStorage
webNavigation
webRequest
webRequestBlocking
<all_urls>

Size:

4.05M

Email:

ub*****@raymondhill.net

URLs:

Full description:

See detailed description ⏷

Source:

Chrome Web Store

Updated:

a day ago

Ranking

# 10

Other rankings

#1 in Privacy & Security

#3 in store keyword 52

#4 in chrome keyword 99

#5 in details keyword 82

#7 in changelog keyword 19

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User reviews

uBlock Origin is widely praised as the best ad blocker, free and open-source with excellent efficiency and low resource impact. It blocks ads, trackers, and malware, enhancing browsing speed and privacy. However, many users face issues caused by Google's restrictions on Chrome extensions, forcing complicated installation workarounds. Some report increased CPU usage and occasional website breakage. Despite these challenges, user reviews strongly endorse uBlock Origin for its effectiveness and trustworthiness.

Pros

Highly effective ad blocker that significantly improves browsing experience.
Lightweight and efficient with low CPU and memory usage.
Open-source, community-driven, and free with no shady business practices.
Blocks ads, trackers, and malware domains out of the box.
Simple to use with sensible defaults and powerful customization options.

Cons

Recent Google policies and Chrome Manifest V3 updates limit or block the extension's functionality.
Some users experience high CPU usage, especially on sites like Facebook.
Occasional site breakage due to ad blocking.
Troubles with installation or enabling the extension due to Google blocking it on Chrome Store.

Recent reviews

best

JP Coronel, 2025-05-11

So good that google tried to get rid of it to attempt to keep ads on youtube 🤣.

littlepatw, 2025-05-10

Being able to use UBO for this long has been a blessing. Have gotten many others to install it over the years. Fantastic extension with no bs. If Google removes this from my Chrome install forcefully, like I'm sure they are going to, I will move to another browser. Unacceptable behavior from Google in all honesty.

Jesse Romine, 2025-05-10

View all user reviews ›

Extension safety

Risk impact

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

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

Risk likelihood analysis details

Medium This extension was updated in the past 3 months. New updates may not be stable or safe.
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