The Best Ad Blockers for Firefox 2025
Don’t let ads fire you up. Instead, get one of our recommended ad blockers for Firefox.
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Last updated Jan 2, 2025
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Best Overall
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Editorial Rating
Learn More
On AdGuard Ad Blocker's website
AdGuard Ad Blocker
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Ad-blocking statistics can be hard to interpret
User-friendly ad blocker that offers broad coverage across browsers and devices without compromising device speed
Ad-blocking statistics can be hard to interpret
View More
Best Affordable Privacy Suite
/images/2023/05/18/surfshark_pos_240px.png)
Editorial Rating
Learn More
On Surfshark CleanWeb Ad Blocking's website
Surfshark CleanWeb Ad Blocking
View More
We determined that the best ad blockers for Firefox are AdGuard, Surfshark CleanWeb, uBlock Origin, and AdLock. AdGuard takes first place thanks to its impressive test scores, full suite of blocking features, and easy-to-use interface.
AdLock and uBlock Origin both performed slightly worse than AdGuard, but still provided a ton of protection and high-quality browsing. Surfshark CleanWeb is a bit unique, as it actually comes bundled with one of the top-rated virtual privacy network (VPN) — Surfshark. That means you get ad blocking plus a host of other security features, like anonymous browsing and more.
Learn more about why we selected these four ad blockers for Firefox.
In this article
The best ad blockers for FirefoxAdGuard
Surfshark CleanWeb
AdLock
uBlock Origin
FAQs
Bottom line
The best ad blockers for Firefox 2025
It’s important to use ad-blocking software combined with a web browser that you trust. We’ve tested some of the most popular ad-blocking services on the Mozilla Firefox browser. All lead the way with their unique security features and ability to bypass unwanted ads (including YouTube ads), making these some of the best overall ad blocking solutions:
- AdGuard: Best overall
- Surfshark CleanWeb: Best for affordable privacy
- AdLock: Best free extension
- uBlock Origin: Best for unique add-ons
Top 4 ad blockers for Firefox compared
| Ad blocker | 
|
 CleanWeb |
|
|
| Star rating | ||||
| Adblocker test score | 100/100 | 98/100 | 97/100 | 97/100 |
| Tracker blocking score | 2/3 | 0.5/3 | 2/3 | 2/3 |
| Price | Free-$6.67/mo | $1.99-$20.65/mo | Free-$3.50/mo | Free |
| Learn more | Get AdGuard Read our AdGuard review |
Get Surfshark CleanWeb Read our CleanWeb review |
Get AdLock Read our AdLock review |
Get uBlock Origin Read our uBlock review |
How we tested the best ad blockers for Firefox
We tested the most important security components for each ad blocker before choosing our top four best ad blockers for Firefox. First, we tested the ad blockers through AdBlock Tester, a site that permits you to test your ad blocker against analytics and advertising services embedded within the testing website.
Next, we tested the ad blocker through Cover Your Tracks, a website that reveals how trackers view a browser. We used the site to test whether the ad blocker was truly blocking tracking ads and invisible trackers. Knowing how important it is for you to bypass social media and video ads, testing the ad blockers on YouTube was the third and final component of our testing process.
We also used Can You Block It tests to determine whether the ad blockers can prevent "ad blocker warning" pop-ups, banner ads, and interstitial ads, or those ads that pop up while the webpage loads.
To ensure that each testing experience was unique, we fully disabled each ad blocker browser extension before enabling the next ad blocker on our list. Additionally, we made our top three selections because they had top scores in blocking ads, blocking trackers, and blocking ads that live on social media, among other factors.
Learn how to boost your browsing security by adjusting Firefox privacy settings and more.
AdGuard: Best overall
AdGuard Ad Blocker
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User-friendly ad blocker that offers broad coverage across browsers and devices without compromising device speed
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The free version provides basic extension-only coverage, while the premium plans boast robust app coverage
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App plans include parental controls, browsing security, browser assistant, DNS leak protection, and a VPN
- Ad-blocking statistics can be hard to interpret
AdGuard is a hidden-gem ad blocker that offers a clean interface and effortless ad blocking. Just set it and forget it. We were impressed by its high scores during our testing, showing strong capabilities when it comes to blocking all types of ads, including tracking cookies.
On top of standard ad blocking, AdGuard also looks out for phishing and other malicious URLs to help protect you while browsing the internet. We appreciated this combination of making our lives better as well as safer.
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What we liked
AdGuard had some impressive test results when we were testing for AdBlock Tester and Cover Your Tracks. AdBlock Tester tests the effectiveness of your ad blocker, factoring in contextual advertising, analytics tools, banner ads, and error monitoring. Cover Your Tracks tests your browser to see how well you're protected from tracking and fingerprinting. These high test scores are important, especially if you choose to pay for an ad blocker — no one wants to pay for something that doesn't work.
AdGuard received a 100/100 score for ad blocking, a perfect score, and 2/3 for tracker blocking, showing that it can block tracking ads and invisible trackers. It also allows for whitelisting and blacklisting, so you can tailor your ad-blocking experience as needed.
What we didn’t like
The only downside to AdGuard is that we found the ad counter that shows up when you open the extension to be inconsistent. It's a fun feature, so we would've liked to trust it better, but kept finding inconsistencies in the counting.
Though this extension is affordable, starting as low as $1.25/mo (billed every five years), it would be even better if it were completely free. But hey, the devs have to get paid!
AdGuardpros and cons
Pros
- Easy to download
- High test scores
- Simple interface
Cons
- Ad blocking statistics were inconsistent
Get AdGuard | Read Our AdGuard Review
Surfshark CleanWeb: Best for affordable privacy
Surfshark CleanWeb Ad Blocking
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Blocks ads, banners, and pop-ups on your browser and apps, including smart TVs
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Enjoy boosted browsing speeds and save money on mobile data with its effective ad-blocking capabilities
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Added benefit of a VPN to encrypt your data, hide your IP address, avoid phishing scams, and minimize malware risks
Similar to NordVPN Threat Protection, Surfshark CleanWeb comes included with Surfshark VPN, both of which are key tools of the Surfshark One cybersecurity suite. By hitting a toggle on your VPN settings, you can block ads and pop-ups, autoplay video ads, cookie pop-up requests, and more.
Surfshark also provides CleanWeb 2.0, which is included with the Surfshark browser extension for Firefox, Google Chrome, and Microsoft Edge. CleanWeb 2.0's capabilities include blocking ads and cookie pop-up banners and receiving alerts for data breaches and malware.
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What we liked
We were pleased to see CleanWeb receive a near-perfect AdBlock Tester score of 98/100. On top of securing our web browsing and streaming, CleanWeb safeguards our online privacy with top-notch VPN services.
We also like that you can get CleanWeb for a cheaper cost than its competitor, Threat Protection. Surfshark's pricing starts at $1.99/mo (billed every two years) for a two-year plan (often with some extra months thrown in), and it allows for unlimited simultaneous connections so you can encrypt your internet connection and block ads on multiple devices.
It also offers a 30-day money-back guarantee, so you can try it out for a month to see if it's right for you.
What we didn’t like
Although Surfshark is an affordable ad blocker, you'd still be required to buy a VPN subscription in order to use Surfshark CleanWeb. This may not be ideal if you already have a VPN or if you're just looking for an ad blocker.
In addition, you can only access CleanWeb 2.0 with the Surfshark browser extension. This can be frustrating if you're trying to block ads on your smartphone or other devices.
Surfshark CleanWeb: pros and cons
Pros
- Works with Surfshark VPN to protect unlimited simultaneous devices
- CleanWeb 2.0 blocks all ads, including YouTube ads
Cons
- Surfshark subscription needed
- CleanWeb 2.0 only available as a browser extension
Get Surfshark CleanWeb | Read Our Surfshark CleanWeb Review
AdLock: Best free extension
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Total Adblock
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Instantly blocks distracting ads on millions of websites, including Facebook and YouTube ads
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Blocks third-party trackers to protect your privacy and information
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Improves page load times and enables faster browsing
AdLock is one of the best free extensions we've tested. Even without paying for a subscription, AdLock blocked most ads with just the extension. It also promises to respect your data privacy by effectively tackling trackers and by not selling or sharing your data.
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What we liked
AdLock received among the highest Cover Your Tracks scores, at 2/3. It not only blocked ads and trackers, it also partially defended against browser fingerprinting. According to Cover Your Tracks, fingerprinting is difficult to detect and thwart considering it tracks your browser by the configuration and settings made available to websites.
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AdLock's privacy privacy is another indicator of its commitment to privacy. It states that it gathers anonymous usage information, but it's stored on your local storage and it's not sold or shared with third parties. We feel good about its data usage, even with the free extension.
With AdLock Premium, you can also download the AdLock apps for Windows, macOS, Android, and iOS. With the app, you'll be able to block ads, trackers, and other annoyances outside of just your Firefox browser.
What we didn’t like
If you opt for a premium subscription, AdLock starts at $1.05/mo but you'll need to commit to a subscription for five years. There are also annual and monthly plans, but those come at a higher cost.
AdLock also had the lowest AdBlock Tester score among our top four picks, since it had some issues with the error monitoring test. However, it still scored above 90 points and was only one point behind NordVPN Threat Protection, so the markdowns were minimal.
AdLock pros and cons
Pros
- Effective free ad blocker extension
- Doesn't share or sell your data to third parties
- Highest Cover Your Tracks score of our top four
Cons
- Premium pricing
- Lowest AdBlock Tester score of our top four
Get AdLock | Read Our AdLock Review
uBlock Origin: Best for unique add-ons
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uBlock Origin
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One of the best totally free ad blockers available
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Highly customizable, open-source ad blocker that's compatible with multiple browsers
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Can block advertising and analytics tools, including banner ads, video ads, and trackers, and can even bypass soft paywalls
- Better suited for advanced users because some features require technical knowledge
uBlock Origin is open-source software that's available on a variety of browsers and offers the most customizable features of any other brand we tested. Along with the basic services of blocking ads, trackers, and malicious URLs, this ad blocker includes several more customizable features that may keep you safe during your web browsing.
Firefox’s website for the uBlock Origin extension calls it “a wide-spectrum content blocker with CPU and memory efficiency as a primary feature.”
Related to the company’s mantra, a user’s personal study on GitHub highlighted that uBlock Origin uses less computer memory than some of the leading brands.[1] The benefits of reducing memory consumption include speed and page stability, so you can use this ad blocker without worrying about sacrificing your PC’s memory data.
uBlock Origin Chrome extension plug-in. /images/2023/03/22/ublocker_origin_review_002.jpg)
What we liked
uBlock Origin scored a perfect 96/100 with AdBlock Tester. We initially had some issues with Cover Your Tracks, but after some tinkering, uBlock Origin received a typical 2/3 test score.
We also liked that the extension offers a multitude of filter lists that you can enable or disable within your settings. These lists are additional options beyond their default settings, such as:
- EasyList Cookie: Blocks cookies banners, GDPR overlay windows, and other privacy-related notices
- Fanboy Annoyances: Blocks social media content, pop-ups, and other annoying objects to help decrease webpage load times
- AdGuard Annoyances: Blocks cookie notifications, pop-ups, mobile app banners, widgets, and other annoyances
- Dan Pollock’s hosts file: Stops your PC from connecting to certain internet hosts to protect you from spyware and pop-up traps, prevent further tracking, and reduce bandwidth use
What we didn’t like
uBlock Origin released its JavaScript blocking feature in September 2018, taking the extension a step forward in blocking Javascript that can hide malware or attempt exploits. While this was a positive step for the organization, some recent user reviews from the Firefox browser extension showed concern about the feature automatically blocking certain websites. Luckily, the developer addressed the issue by fixing it in GitHub and responding directly to the review.
In addition, uBlock Origin is one of only two ad blockers that's been taken down from Google Chrome. Google updated its extension specifications from Manifest v2 to Manifest v3, and uBlock Origin is no longer compatible with these specifications.
This will likely not effect you if Firefox is your primary browser, but it's worth noting if you need an ad blocker for Chrome as well.
uBlock Origin pros and cons
Pros
- Software doesn’t use as much PC memory
- Offers customizable add-on features
Cons
- Scripting block feature may block content from wanted websites
- No longer available on Google Chrome
FAQs
+
Does Firefox have a built-in ad blocker?
Firefox does not offer a built-in ad-blocking service, but it does have several ad-blocking extensions to choose from and download. Visit the Firefox Browser Add-ons page, search for ad blockers, then sort ad blocker options with filters like “Top Rated” or “Most Users.”
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How do I turn off an ad blocker on Firefox?
Follow these instructions to turn off an ad blocker (or any other Firefox add-on):
- Open the Mozilla Firefox browser.
- Select the three lines in the upper-right part of your screen.
- Click Settings > Extensions and themes.
- Under “Manage your extensions,” turn your ad blocker off by moving the button to the off position.
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Can you block Twitch ads on Firefox?
If you want to use ad blocking for Twitch on Firefox, the free version of Adblock Plus lets you enable this filter. uBlock Origin, one of our top-rated Firefox ad blockers, used to block ads on Twitch but no longer offers this feature. Read our article on the best ad blockers for Twitch for more options.
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Can you block YouTube ads on Firefox?
After undergoing testing, we can confirm NordVPN Threat Protection, AdLock, Surfshark CleanWeb, and uBlock Origin can block YouTube ads.
Bottom line
Our top four best ad blockers for Firefox all blocked ads, trackers, and potential malware, and they passed our hands-on tests while browsing the web and with AdBlock Tester and Cover Your Tracks. But we've found that the best ad blocker for Firefox is AdGuard.
Although AdLock, Surfshark CleanWeb, and uBlock Origin all have their merits, AdGuard had the best scores of all of them.
4 best ad blockers for Firefox 2025
| Best for | Compatibility | Learn more | |
|
|
Best overall | Chrome, Firefox, Edge, Android, iOS, Windows, macOS, Linux | Get AdGuard |
CleanWeb |
Best for affordable privacy | Chrome, Firefox, Edge, Android, iOS, Windows, macOS, Linux, FireTV |
Get Surfshark CleanWeb |
|
Best free extension | Chrome, Firefox, Safari, Android, iOS, Windows, macOS | Get AdLock |
|
Best for unique add-ons | Firefox, Edge, Safari (prior to 13), Opera, Chromium | Get uBlock Origin |
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NordVPN Threat Protection
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Stops intrusive ads before they can even load, improving browsing experience and speed
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Identifies malware-ridden files and protects against visiting malicious websites
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Encrypts your data and blocks third-party trackers for increased security and privacy
Author Details
/authors/robin-moore-aac-bio.jpg)
Robin Moore is a freelance writer and editor specializing in blockchain technology, including wallet
security and data privacy. She is the current Managing Editor for Watcher.Guru, a startup blockchain
and finance news publication with 1.7 million followers on Twitter. Robin has also been the lead
content editor with Genfinity.IO, another startup blockchain research publication. Before entering the
Web3 space, she was a business analyst within the oil and gas industry.
When she is not offering advice on the best ways to protect data privacy, she is hiking, doing yoga, or
networking with her Web3 family on crypto-Twitter.
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