uBlock Origin

uBlock Origin

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

What is uBlock Origin?
uBlock Origin is an efficient wide-spectrum content blocker for Firefox, designed with performance and low resource usage in mind. It effectively blocks ads, trackers, coin miners, and popups by default, using various filter lists like EasyList and EasyPrivacy. uBlock Origin also offers advanced features like custom rules and JavaScript blocking, and it's both free and open-source, maintained by a community dedicated to online privacy and user empowerment.
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

# 5

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.
  • Effectiveness in blocking ads and unwanted content
  • Easy to use
  • Ability to customize and manage filters
  • Issues with automatic subscription activation and updates
  • Occasional difficulty in blocking certain content on specific websites
Most mentioned
  • Effectiveness in blocking ads and unwanted content
  • Easy to use
  • Manually activating and updating subscriptions
  • Customization and filter management
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.

Upgrade to see risk analysis details