The 8 Best Ad Blockers for Firefox in 2020

Stop web tracking and ads with these extensions and apps

The Firefox Add-ons directory is home to hundreds of extensions including tools meant to improve your browsing experience and protect your privacy. We've tested them all to determine the best ad blockers for Firefox.

This article applies to the desktop version of Firefox for all operating systems.

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Most Popular Ad Blocker: Adblock Plus

Adblock Plus settings page with "Allow Acceptable Ads" box checked by default.
What We Like
  • Attempts to balance ad blocking with need for site revenue.

  • Easily adjust default configuration settings.

What We Don't Like
  • Choose which ads are allowed to display.

  • No option to quickly view the specific ads or trackers blocked.

One of the most popular extensions, Adblock Plus blocks most ads. The extension allows certain ads that are deemed non-intrusive, but it also offers a switch to turn this feature off.

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Power-User Friendly: uBlock Origin

uBlock Origin setting page, with 15 checkboxes for various settings, and 6 tabs of additional configuration options
What We Like
  • Plenty of custom lists.

  • Power-user configuration choices.

What We Don't Like
  • Some settings may break or disable certain sites.

  • Auto-play videos on some sites are not always blocked.

uBlock Origin lets you choose from several lists of filters. Each filter you select blocks a bit more content and also uses a bit more system memory. You can also create custom filter rules or set the system to allow ads on specific sites.

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Simple to Set Up Adblock for Firefox: Disconnect site, with Disconnect extension options showing content requests (advertising, analytics, social, content)
What We Like
  • Minimal set up and configuration required.

  • Can use Disconnect alongside most other ad block extensions.

What We Don't Like
  • Fewer configurable options than some ad block extensions.

  • When used with other ad block extensions, it can be tricky to identify which extension blocks specific content.

Disconnect protects your privacy by disabling web content that is attempting to track you. Since almost all ad networks try to track you, when Disconnect blocks trackers, it also blocks ads. The company that makes Disconnect also offers paid services that guard against tracking not only in your browser but on your devices as well.

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Block All the Ads: AdBlocker Ultimate site with AdBlocker Ultimate extension showing number of block ads and elements
What We Like
  • The code is open source.

  • Seeks to block all ads with no exceptions.

What We Don't Like
  • Can't quickly view specific ads or trackers blocked.

  • Update schedule varies.

Unlike some ad block services, AdBlocker Ultimate seeks to block all ads with no exceptions. For example, AdBlocker Ultimate blocks auto-play videos on sites that other ad blockers allow to play.

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Stop Video Ads: AdBlocker for YouTube

Firefox extension page for AdBlocker for YouTube by AdblockLite
What We Like
  • Blocks all video ads on YouTube.

  • Avilable for desktops and mobile devices.

What We Don't Like
  • Doesn't block ads on any other video service.

  • Content creators don't recieve ad revenue when you block ads.

This extension seeks to block ads on YouTube as well as annotations. It works on both the desktop and mobile versions of Firefox. Once installed, you’ll no longer need to look for the “Skip Ad” button after a commercial starts.

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Upgrades Available: AdGuard Adblocker product page, with AdGuard extension displayed in upper right (0 block on page, 42 blocked total)
What We Like
  • Filters automatically upgrade every 48 hours by default.

  • Customize many settings.

What We Don't Like
  • May take time to configure settings as desired.

  • Frequent recommendations to upgrade to paid products.

AdGuard updates often and blocks most ads effectively. Some frames for video pop-ups periodically appear, but AdGuard prevents the videos from playing. The company also offers additional privacy tools such as VPN and DNS services.

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Block and Learn More: Ghostery

Firefox Add-on page for Ghostery with Blocking settings of extension displayed (Advertising, Site Analytics, Customer Interaction, Social Media, Essential)
What We Like
  • Many settings may be adjusted.

  • Create an account to sync settings across systems.

What We Don't Like
  • Configuration settings are in many different places.

  • The default settings sometimes block article images in addition to ads.

A favorite of many long-time web users, Ghostery offers the ability to display exactly which ads and trackers are blocked. Select the extension and select the “Detailed View” tab, or select the purple circle in the lower-right corner on pages with blocked items.

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Ad-Free Mobile Browsing: Firefox Focus

Firefox Focus for Android
What We Like
  • All trackers blocked by default.

  • Turn off blocking for specific sites.

What We Don't Like
  • Default settings share usage data with Mozilla.

  • Mobile-only (no Firefox Focus for Windows, macOS, or Linux).

If you use an Android or iOS device, take a look at Firefox Focus. This mobile browser blocks all ads and trackers by default. On iOS, you can configure Firefox Focus to also serve as a content blocker for Safari, enabling the browser to block the same ads and trackers blocked in Firefox Focus.

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