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 Mar 5, 2025
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Best Value
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Editorial Rating
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On Surfshark CleanWeb Ad Blocking's website
Surfshark CleanWeb Ad Blocking
Blocks ads, banners, and pop-ups on your browser and apps, including smart TVs
View More
Best Hidden Gem
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View More
Surfshark CleanWeb is our top pick due to its overall value and performance. CleanWeb comes bundled with Surfshark VPN, one of the top-rated virtual privacy networks on the market. That means you get ad blocking plus a host of other security features, like anonymous browsing and more.
NordVPN Threat Protection also comes with one of the best VPNs, but we found other ad blockers to be more user-friendly. AdGuard and AdLock are both freemium ad blockers, while uBlock Origin is totally free. AdLock and uBlock Origin both performed slightly worse than AdGuard but still provided a ton of protection and high-quality browsing.
Learn more about why we selected these five ad blockers for Firefox.
In this article
The best ad blockers for FirefoxSurfshark CleanWeb
AdGuard
NordVPN Threat Protection
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 blockers:
- Surfshark CleanWeb: Best for affordable security
- AdGuard: Best hidden gem
- NordVPN Threat Protection: Best for online privacy
- AdLock: Best free extension
- uBlock Origin: Best for unique add-ons
Top 5 ad blockers for Firefox compared
 CleanWeb |
|
 Threat Protection |
|
|
|
| Star rating | |||||
| Ad blocker test score | 96/100 | 100/100 | 96/100 | 100/100 | 100/100 |
| Tracker blocking score | 0.5/3 | 2/3 | 2/3 | 2/3 | 2/3 |
| Price | $2.19-$20.65/mo | $2.49-$6.67/mo | $3.39–$17.99/mo | $1.05-$3.50/mo | Free |
| Learn more | Get Surfshark CleanWeb Read our CleanWeb review |
Get AdGuard Read our AdGuard review |
Get NordVPN Threat Protection Read our NordVPN Threat Protection 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 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.
Surfshark CleanWeb: Best for affordable security
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
Surfshark CleanWeb comes with Surfshark VPN, and both are key tools in 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.
What we liked
Value: We like that you can get CleanWeb cheaper than its competitor, NordVPN Threat Protection. Surfshark's pricing starts at $2.19/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.
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Protection: We were pleased to see CleanWeb receive a near-perfect AdBlock Tester score of 96/100. On top of securing our web browsing and streaming, CleanWeb safeguards our online privacy with top-notch VPN services.
What we didn’t like
No standalone ad blocker: Although Surfshark is an affordable ad blocker, you'd still be required to buy a VPN subscription 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.
CleanWeb 2.0 is an extension only: 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 is only available as a browser extension
Get Surfshark CleanWeb | Read Our Surfshark CleanWeb Review
AdGuard: Best hidden gem
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
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. Plus, the premium versions include parental controls, which is uncommon for ad-blocking software.
What we liked
Diverse ad blocking: AdGuard had some impressive test results when we were testing for AdBlock Tester. AdBlock Tester tests the effectiveness of your ad blocker, factoring in contextual advertising, analytics tools, banner ads, and error monitoring. 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.
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Phishing protection: 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.
What we didn’t like
Wonky stats: 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 we kept finding inconsistencies in the counting.
Limited free version: AdGuard offers a free extension, but it doesn't block ads in apps and games. Plus, you'll have to opt for a premium subscription to get parental controls.
AdGuard pros and cons
Pros
- User-friendly with broad device coverage
- Perfect AdBlock Tester scores
Cons
- Ad-blocking statistics were inconsistent
- Free version doesn't include parental controls
Get AdGuard | Read Our AdGuard Review
NordVPN Threat Protection: Best for online privacy
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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
NordVPN Threat Protection is an integrated ad and malware blocker included with NordVPN, one of the best virtual private networks available. But its plans come with a lot more than just the ability to encrypt your internet connection. You can use it to block ads, trackers, and malicious websites, and to scan downloaded files for malware.
You can also opt to use Threat Protection Lite while connected to NordVPN, ensuring that your device is protected from pesky ads and malicious sites whenever you need.
What we liked
Privacy: NordVPN Threat Protection offers enhanced privacy with the inclusion of NordVPN, the #1-rated VPN on the market. In addition to blocking most ads and trackers, Threat Protection also allows for whitelisting and blacklisting, so you can tailor your ad-blocking experience as needed.
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Malware protection: We also like that Threat Protection can block malware, too. Threat Protection passed our malware detection and phishing detection tests, so we felt reassured that NordVPN could act as a well-rounded cybersecurity suite. Like other Nord products, Threat Protection was easy to set up, and its interface was intuitive.
What we didn’t like
Price: NordVPN Threat Protection can be pricey, considering you're paying for a VPN subscription and not just a premium ad blocker. Surfshark has its own ad and malware blocker, known as CleanWeb, which is more affordable.
Lite is limited: If you opt to use Threat Protection Lite, the capabilities are pretty limited. Threat Protection Lite can't block trackers or scan for malware, which could put your device in danger of malware if you're not using an antivirus program. It can also be inconsistent about blocking YouTube ads.
NordVPN Threat Protection: pros and cons
Pros
- Blocks ads, trackers, and malware
- Allows for whitelisting and blacklisting
Cons
- There are cheaper alternatives on the market, like Surfshark CleanWeb
- Threat Protection Lite is limited
Get NordVPN Threat Protection | Read Our NordVPN Threat Protection Review
AdLock: Best free extension
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AdLock
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Offers a free extension that's compatible with major browsers and a premium plan with Windows, macOS, Android, and iOS compatibility
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Effective blocker against follow-along videos, banner ads, YouTube ads, and more
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Doesn't share or sell your data with third parties
AdLock is one of the best free extensions we've tested. AdLock blocked most ads with just the extension, even without paying for a subscription. It also promises to respect your data privacy by effectively tackling trackers and not selling or sharing your data.
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 liked
Anti-tracking: AdLock received among the highest Cover Your Tracks scores, at 2/3. 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 upgrade. It not only blocked ads and trackers, but 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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Private free extension: AdLock's privacy privacy is another indicator of its commitment to privacy. It states that it gathers anonymous usage information, but it's stored in your local storage and is not sold or shared with third parties. We feel good about its data usage, even with the free extension.
What we didn’t like
Long subscription period: If you opt for a premium subscription and want to get the best value, you'll need to commit to a five-year subscription. There are also annual and monthly plans, but those come at a higher cost.
Limited free extension: It's unique that AdLock includes a blocker specifically for social media, but we didn't like that it came at a premium price. Plus, the spyware blockers are only available with a paid plan.
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 picks
Cons
- Premium pricing
- Social media and spyware blockers only available on paid tier
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.
What we liked
Good free ad blocking: uBlock Origin scored a 100/100 with AdBlock Tester, which is solid. We initially had some issues with Cover Your Tracks, but after some tinkering, uBlock Origin received a typical 2.5/3 test score.
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Unique filters: 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
Not Chrome compatible: In addition, uBlock Origin is one of only two ad blockers that have been removed 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 affect you if Firefox is your primary browser, but it's worth noting if you need an ad blocker for Chrome as well.
Growing pains: 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 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.
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.”
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.
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.
Can you block YouTube ads on Firefox?
After undergoing testing, we can confirm that Surfshark CleanWeb, AdGuard, NordVPN Threat Protection, AdLock, and uBlock Origin can block YouTube ads.
Bottom line
Our top ad blockers for Firefox all blocked ads, trackers, and potential malware. To make the list, they all had to easily pass our hands-on tests while browsing the web with AdBlock Tester, Cover Your Tracks, and Can You Block It. But we've found that the best ad blocker for Firefox is Surfshark CleanWeb.
Although AdGuard, NordVPN Threat Protection, AdLock, and uBlock Origin all have their merits, Surfshark offers the best value.
5 best ad blockers for Firefox 2025
| Best for | Compatibility | Learn more | |
CleanWeb |
Best for affordable security | Chrome, Firefox, Edge, Android, iOS, Windows, macOS, Linux, FireTV |
Get Surfshark CleanWeb |
|
|
Best overall | Chrome, Firefox, Edge, Android, iOS, Windows, macOS, Linux | Get AdGuard |
Threat Protection |
Best for online privacy | Threat Protection Pro: Windows, macOS Threat Protection: Windows, macOS, Android, iOS, Linux, Chrome, Firefox, Edge |
Get NordVPN Threat Protection |
|
Best free extension | Chrome, Firefox, Safari, Android, iOS, Windows, macOS | Get AdLock |
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Best for unique add-ons | Firefox, Edge, Safari (prior to 13), Opera | Get uBlock Origin |
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
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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