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).
- 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
- <all_urls>
- Size:
- 4.48M
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Browser Add-ons
- Updated:
- a day ago
Related Articles
User reviews
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
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 ****** ****** ** ******* ***** ***** *** ** **** ** ***** **** ******** ****** *** ******** ********** * ******* ********
- Critical ******* ****** ** *** ********* ******** ********************
- 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
Compare add-ons
- Compare Adblock Plus vs AdBlock Plus
- Compare Adblock Plus vs AdBlock for Firefox
- Compare Adblock Plus vs AdsBlocker
Similar add-ons
Here are some Firefox add-ons that are similar to Adblock Plus:

AdBlock Plus
Adblock Plus

AdBlock for Firefox
AdBlock

AdsBlocker
AdsBlocker

AdBlock Free
Adblock

Youtube AdBlocker Plus
Arnav

AdBlock Secure
SecureTools

AdLock
Hankuper s.r.o.

AdBlox - Ad Blocker
AdBlox

AdBlock Ninja for Firefox
AdBlock Ninja
Popular extensions / apps
Here are some popular extensions / apps that you might be interested in:
ChatGPT Writer: Use AI on Any Site (GPT-4.1, Claude, Gemini, and More)
https://chatgptwriter.ai
Photoroom AI Photo Editor
Photoroom AI Photo Editor
Checker Plus for Gmail™
https://jasonsavard.com
Tennis Clash: Multiplayer Game
Wildlife Studios
Block Blast!
HungryStudio
Candy Crush Jelly Saga
King
Sound Booster - increase volume up
https://https://sound-ultimate.com/

Privacy Badger
EFF Technologists
wanteeed
https://https://wanteeed.com/
Zomato: Food Delivery & Dining
Zomato
Adobe Acrobat Reader: Edit PDF
Adobe
AdBlocker Ultimate
AdAvoid Ltd