AdBlock for Firefox

The most popular ad blocker for Chrome and Safari, now available for Firefox! Block all advertisements on all web pages, even Facebook, Youtube, and Hulu. Browse faster, too! Most ads aren't even downloaded at all, saving you time and bandwidth.
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AdBlock for Firefox brings the trusted ad blocking experience to Mozilla's browser, now used by over 40 million users for Chrome and Safari. It blocks all advertisements by default—including video ads on popular sites like YouTube, Facebook, and Hulu—resulting in faster browsing and saved bandwidth since most ads aren't downloaded at all.

This extension supports customizable filter lists, in-page ad reporting, and quick enabling of ads on favorite sites or entire domains. Available in 30+ languages, AdBlock allows you to personalize your browsing by easily toggling ads on pages like Google search results if you prefer text ads. Enjoy a cleaner, faster, and more private browsing experience with AdBlock for Firefox.

Manifest V2 Privacy & Security Productivity Utilities
By:
AdBlock
Daily users:
1,312,183+ 18.22K
Rating:
4.24
(3,455) 2 new ratings
Version:
6.20.0 Last updated: 2025-05-07
Version code:
5939192
Creation date:
2014-07-24
Risk:
Very high risk impact Low risk likelihood
Permissions:
  • <all_urls>
  • alarms
  • contextMenus
  • idle
  • notifications
  • storage
  • tabs
  • unlimitedStorage
  • webNavigation
  • webRequest
    • See more
Size:
5.71M
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Browser Add-ons
Updated:
a day ago

Ranking

# 12
Other rankings
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User reviews

Users find 'AdBlock for Firefox' generally effective and easy to use for blocking ads on many sites. However, it struggles with YouTube, where the extension is often disabled and ads continue to play. Additionally, some users report that the plugin turns itself off on certain pages and complain about frequent donation popups, reducing its overall appeal.
Pros
  • Generally effective at blocking ads on most sites.
  • Simple and easy to use.
  • Provides a familiar ad-blocking experience similar to other popular ad blockers.
Cons
  • Fails to block ads on YouTube as YouTube detects and disables the plugin.
  • Occasionally deactivates itself on specific pages, notably YouTube.
  • Displays nagging popup requests for donations or money, which annoy users.
Recent reviews
by Patty, 2025-05-14
by Firefox user 12179061, 2025-05-10
by Bob, 2025-05-06
View all user reviews ›

Extension safety

Risk impact

AdBlock for Firefox 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 for Firefox 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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