Adblock Plus

One of the most popular free ad blockers for Firefox. Block annoying ads on sites like Facebook, YouTube and all other websites. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
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Adblock Plus is a highly popular free ad blocker for Firefox, with nearly 500 million downloads. It blocks annoying ads, popups, video ads on sites like YouTube, and protects your privacy by stopping trackers and social media icon tracking. By speeding up page loading times and reducing malvertising risks, it gives you a safer and cleaner browsing experience.

This extension also supports the Acceptable Ads initiative, displaying nonintrusive ads by default to support websites relying on advertising revenue. Users can customize filters, whitelist favorite sites, or block all ads entirely. Adblock Plus balances user control with support for content producers, ensuring a fair and sustainable online environment.

Manifest V2 Privacy & Security Productivity Utilities
By:
Adblock Plus
Daily users:
3,328,315+ 20.60K
Rating:
4.39
(11,221) 12 new ratings
Version:
4.21.3 Last updated: 2025-05-14
Version code:
5948104
Creation date:
2006-01-17
Risk:
Very high risk impact Low risk likelihood
Permissions:
  • <all_urls>
  • alarms
  • contextMenus
  • notifications
  • storage
  • tabs
  • unlimitedStorage
  • webNavigation
  • webRequest
  • webRequestBlocking
Size:
4.48M
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Browser Add-ons
Updated:
a day ago

Ranking

# 2
Other rankings
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User reviews

Adblock Plus is praised for making browsing more enjoyable by effectively blocking many ads. However, users commonly complain about it randomly disabling on some sites, unsolicited tabs urging payment, and the controversial 'acceptable ads' policy that permits some ads, undermining trust. Additionally, developer responses to these issues are often seen as inadequate, leading to user dissatisfaction.
Pros
  • Effective at blocking ads, making browsing more bearable.
  • Has been reliable and effective for long-time users.
  • Generally efficient in ad blocking on various websites.
Cons
  • Randomly disables itself on some sites without user consent, showing ads despite user settings.
  • Displays frequent, unsolicited tabs prompting users to pay for premium, disrupting user experience.
  • Maintains the 'acceptable ads' policy, allowing some ads through, which many users dislike and see as deceptive.
  • Developers' responses to criticism are perceived as copy-paste and unhelpful, frustrating users.
Recent reviews
by VeroOjou-sama, 2025-05-22
Best extension ever, always on, always right!
by Beer, 2025-05-21
by Firefox user 17656241, 2025-05-21
View all user reviews ›

Extension safety

Risk impact

Adblock Plus requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • Critical ****** ****** ** ******* ***** ***** *** ** **** ** ***** **** ******** ****** *** ******** ********** * ******* ********
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  • High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******
  • High ****** ********* ** * ****** ******** ******** ********** * ******* ******* *****
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
  • Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
  • Medium ****** ** ********* ****** ********* *** **** ****** **** **** ** ******* ** ********** **** ***********
Risk likelihood

Adblock Plus has earned a fairly good reputation and likely can be trusted.

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

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