AdBlocker Ultimate

AdBlocker Ultimate

Completely remove ALL ads. No “acceptable” ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware.

AdBlocker Ultimate promo image
What is AdBlocker Ultimate?

AdBlocker Ultimate is a free, open-source Firefox add-on with a primary purpose to remove all kinds of ads and halt sneaky tracking. It's designed to boost the browser's performance by eliminating unwanted contents and halts ad firms that pay to bypass filters. The AdBlocker allows users to toggle on ads from selected, trusted websites. It helps block malware, improve browser and page load speed, decrease memory and bandwidth use. Also available for Chrome, Edge, iOS, Mac, Opera, Yandex, and Windows.

Stats date:
By: AdAvoid
Version: 3.8.14 (Last updated: 2023-11-29)
Creation date: 2016-02-18
Weekly download count: 70,196
Firefox on Android: Yes
Manifest version: 2
  • tabs
  • <all_urls>
  • webRequest
  • webRequestBlocking
  • webNavigation
  • storage
  • unlimitedStorage
  • contextMenus
Size: 6.63M
Email: Click to see
Risk impact: High risk impact
Risk likelihood: Very low risk likelihood

Other platforms

AdBlocker Ultimate
AdBlocker Ultimate (v3.8.14)
4.83 (49,508) 1,310,669
AdBlocker Ultimate
AdBlocker Ultimate (v3.8.14)
4.80 (3,012) 601,914

AdBlocker Ultimate is designed with a singular purpose: remove all ads so you can focus your attention on the content you want.


  • Remove all ads
  • Helps block malware and tracking
  • Improves browser performance by removing unwanted content
  • No "acceptable" ads or whitelisted websites/ad networks

AdBlocker Ultimate is a free extension that blocks ads and malicious domains known to spread malware; it also disables sneaky tracking. We have extensive filters that filter against annoying display and video ads (including YouTube).

Unlike other ad blockers, we do not have “acceptable ads” or an advertiser whitelist (i.e. certain advertisers pay to bypass ad filters). Blocking ads has the added benefit of speeding up browsing because filtering out ads reduces CPU and memory usage.

AdBlocker Ultimate allows you to easily accept ads from websites you choose, in cases where you want to give advertising credit to certain trusted websites.

*** Types of ads we block ***

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User reviews
User reviews summary
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.
  • Effective at blocking ads
  • Easy to use
  • Blocks YouTube ads
  • YouTube sometimes prevents videos from being viewed when using it
  • Doesn't block some pop-ups on certain sites
Most mentioned
  • Blocks YouTube ads
  • Easy to use
  • Issues with YouTube video playback
View all user reviews
Risk impact

AdBlocker Ultimate is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install AdBlocker Ultimate if you trust the publisher.

Risk likelihood

AdBlocker Ultimate has earned a good reputation and can be trusted.

Upgrade to see risk analysis details