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).

Adblock Plus - Free Ad Blocker for Firefox
"Adblock Plus" is a popular Firefox add-on that blocks annoying ads on various websites including YouTube and Facebook. With nearly 500 million downloads, the tool not only blocks intrusive ads but also supports the Acceptable Ads initiative by default, enabling nonintrusive ads to support content creators. Furthermore, it enhances online privacy by blocking trackers and social media icon tracking. Users have the option to whitelist favorite websites and create custom filters for a more personalized experience.
Add-on stats
Manifest V2
By: Adblock Plus
Rating: 4.41
7 new ratings
(11,076)
Weekly download count: 47,521
Firefox on Android: Yes
Permissions:
- <all_urls>
- alarms
- contextMenus
- notifications
- storage
- tabs
- unlimitedStorage
- webNavigation
- webRequest
- webRequestBlocking
Size: 4.38M
URLs: Website ,Privacy policy
Full description: See detailed description
Ranking
# 2
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
User reviews
Pros
- Effective at blocking ads
- Custom filtering rules available
- Long-term user satisfaction
- Reliable and trustworthy
- Highly recommended by users
Cons
- Issues with YouTube ads
- Missing icon functionality for some users
- Loss of the 'acceptable ads' feature
- Difficulty accessing certain articles due to blocking
Most mentioned
- YouTube ad blocking issues
- Custom filtering capabilities
- Reliability and effectiveness
- Long-standing user satisfaction
- Removal of acceptable advertising feature
User reviews
by Firefox user 15607570, 2025-03-09
Charged me $44.20 for some reason
by Firefox user 16783020, 2025-03-08
Annoying popup window to buy premium every month.
by Alexander, 2025-03-05
Add-on 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.
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Risk likelihood
We don't have sufficient data to confidently determine the risk likelihood of Adblock Plus. 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.
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