uBlock Origin

uBlock Origin

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

What is uBlock Origin?
uBlock Origin is a Firefox add-on that serves as an efficient wide-spectrum content blocker, targeting ads, trackers, and other undesirable content while prioritizing low CPU usage and minimal memory footprint. Beyond ad-blocking, it offers customizable filters and advanced user controls for a personalized and streamlined browsing experience.
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

# 4

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
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