uBlock Origin

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

uBlock Origin - Wide-spectrum Content Blocker Add-on for Firefox

uBlock Origin is a high-performance, wide-spectrum Firefox add-on. Beyond being just an 'ad blocker', it excels in blocking a wide array of content, including ads, trackers, coin miners and popups instantly. Pre-configured with several filter lists like EasyList (for ads) and EasyPrivacy (tracking), it offers immense customization to the users. The add-on is a unique blend of CPU and memory efficiency, aiming to deliver a seamless browsing experience.
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View on Firefox Browser Add-ons

Add-on stats

Manifest V2
Daily users: 9,600,201
57.05K
69 new ratings
Version: 1.62.0 (Last updated: 2025-03-06)
Version code: 5868389
Creation date: 2015-04-25
Weekly download count: 296,681
Firefox on Android: Yes
Permissions:
  • alarms
  • dns
  • menus
  • privacy
  • storage
  • tabs
  • unlimitedStorage
  • webNavigation
  • webRequest
  • webRequestBlocking
    • See more
Size: 3.97M
Full description: See detailed description

Ranking

# 1
Other rankings
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Other platforms

Not available on Chrome
Not available on Android
Not available on Edge

User reviews

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.
Pros
  • Extremely effective ad blocker
  • Works well on tricky websites like YouTube
  • Highly adaptable and customizable
Cons
  • Issues with ignoring custom filters
  • Perception of being unmaintained or less effective over time
Most mentioned
  • Effectiveness in blocking ads
  • Problems with custom filters
User reviews
by nohok, 2025-03-09
This is hands down the best ad blocker out there. No ads appear on any website, including YouTube.
by drsharpie, 2025-03-09
by Firefox user 18649563, 2025-03-09
View all user reviews

Add-on 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

We don't have sufficient data to confidently determine the risk likelihood of uBlock Origin. Use it at your own risk.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** **** **** ****** ******* ********** **** ****** ** ** ****** *** *****
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Upgrade to see full risk analysis details