uBlock Origin

uBlock Origin

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

What is uBlock Origin?
uBlock Origin is an advanced content blocker designed to efficiently filter out various types of unwanted content, including advertisements, tracking scripts, and malicious URLs. Using less CPU and memory compared to other solutions, it offers out-of-the-box protection with EasyList, EasyPrivacy, and more. It's free, open-source, and boasts user-friendly customizable features, like JavaScript blocking and personalized filter rules. Suited for conscientious users, it promotes support for community-maintained filter lists.
Version: 1.57.2 (Last updated: 2024-04-17)
Creation date: 2015-04-25
Weekly download count: 152,687
Firefox on Android: Yes
Risk impact: Very high risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
  • alarms
  • dns
  • menus
  • privacy
  • storage
  • tabs
  • unlimitedStorage
  • webNavigation
  • webRequest
  • webRequestBlocking
  • See more
Size: 3.86M
Stats date:

Chrome-Stats Rank

# 6

Other platforms

uBlock Pro
uBlock Pro (v2.1.7)
4.20 (126) 20,000
uBlock Origin
uBlock Origin (v1.57.2)
4.60 (2,019) 16,278,810
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uBlock Origin is not an "ad blocker", it's a wide-spectrum content blocker with CPU and memory efficiency as a primary feature.

Out of the box, uBO blocks ads, trackers, coin miners, popups, etc. through the following lists of filters, enabled by default:

  • EasyList (ads)
  • EasyPrivacy (tracking)
  • Peter Lowe’s Ad server list (ads and tracking)
  • Online Malicious URL Blocklist
  • uBO's own lists

More lists are available for you to select if you wish:

  • EasyList Cookie
See more
User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Effectively blocks ads
  • Improves browsing experience
  • Protects against online exploitation
  • Inconsistent performance on certain websites
  • UI design can be annoying
  • Requires manual activation of subscriptions and updates for some users
Most mentioned
  • Effectively blocks ads
  • Improves browsing experience
  • Protects against online exploitation
Recent reviews

uBlock Origin is literally the first thing I load when setting up a new machine. Indispensable!

View all user reviews
Risk impact

uBlock Origin is very risky to use and it requires a lot of sensitive permissions. Avoid installing this add-on unless you absolutely trust this publisher.

Risk likelihood

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

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