The Best Ad Blockers for Firefox 2026

Surfshark CleanWeb is the best ad blocker for Firefox due to its overall value and performance. CleanWeb comes bundled with Surfshark VPN, which is one of our top VPN recommendations. With Surfshark, you can get efficient ad blocking, anonymous browsing, email masking, and more. 

We also recommend NordVPN Threat Protection for its VPN and malware protection, AdLock for its reliable freemium product, and uBlock Origin for its advanced customization options. 

Learn more about why we selected these four ad blockers for Firefox.

The best ad blockers for Firefox 2026

Compare the best Firefox ad blockers

	CleanWeb	Threat Protection
Best for	Affordable security	Online privacy	Free extension	Unique add-ons
Star rating	4.8 AllAboutCookies writers and editors score products based on a number of objective features as well as our expert editorial assessment. Our partners do not influence how we rate products.	4.5 AllAboutCookies writers and editors score products based on a number of objective features as well as our expert editorial assessment. Our partners do not influence how we rate products.	4.6 AllAboutCookies writers and editors score products based on a number of objective features as well as our expert editorial assessment. Our partners do not influence how we rate products.	4.7 AllAboutCookies writers and editors score products based on a number of objective features as well as our expert editorial assessment. Our partners do not influence how we rate products.
Ad blocker test score	96/100	86/100	96/100	100/100
Price	$1.99-$20.85/mo	$3.39–$25.29/mo	$1.05-$9.95/mo	Free
Learn more	Get Surfshark CleanWeb Read Surfshark CleanWeb Review	Get NordVPN Threat Protection Read NordVPN Threat Protection Review	Get AdLock Read our AdLock Review	Get uBlock Origin Read uBlock Origin Review

Surfshark CleanWeb: Best for affordable security

Surfshark CleanWeb is integrated with Surfshark's virtual private network (VPN). By enabling the CleanWeb toggle on your VPN settings, you can block ads and pop-ups, autoplay 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, blocking cookie pop-up banners, and receiving alerts for data breaches and malware.

What we liked

Value: We appreciate that you can get CleanWeb at a lower price than its competitor, NordVPN Threat Protection. Surfshark's pricing starts at $1.99/mo 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. 

Protection: We were pleased to see CleanWeb receive a near-perfect AdBlock Tester score of 96/100. In addition to securing our web browsing and streaming, CleanWeb protects 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 are simply 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

Test results

Star rating summary

NordVPN Threat Protection: Best for online privacy

NordVPN Threat Protection is an integrated ad and malware blocker included with NordVPN, one of the best VPNs 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 intrusive 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.

Malware protection: We also appreciate that Threat Protection can block malware. Threat Protection passed our malware detection and phishing detection tests, giving us reassurance 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

Test results

Star rating summary

AdLock: Best free extension

AdLock is one of the best free extensions we've tested. AdLock blocked most ads with just the extension, even without a paid 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 your Firefox browser. 

What we liked

Anti-tracking: AdLock provides strong protection against online tracking based on our in-house testing. 

Private free extension: AdLock's privacy policy is another indicator of its commitment to privacy. It states that it gathers anonymous usage information, but this data is 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

Test results

Star rating summary

uBlock Origin: Best for unique add-ons

uBlock Origin is open-source software available on various browsers, offering the most customizable features of any brand we tested. Along with the basic services of blocking ads, trackers, and malicious URLs, this ad blocker offers several additional customizable features that can help 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.

What we liked

Good free ad blocking: uBlock Origin scored a 100/100 with AdBlock Tester, which is a perfect score. It blocked all the ads in the contextual advertising, analytics tools, banner advertising, and error monitoring categories.

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 cookie 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

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

Test results

Star rating summary

How we tested the best ad blockers for Firefox

We thoroughly tested the most critical security components of each ad blocker before selecting our top ad blockers for Firefox. First, we tested the ad blockers using AdBlock Tester, a site that lets you test your ad blocker against analytics and advertising services embedded in the testing website.

We also used Can You Block It tests to determine whether ad blockers can prevent "ad blocker warning" pop-ups, banner ads, and interstitial ads that appear while the webpage loads. 

To ensure each testing experience was unique, we fully disabled each ad blocker extension before enabling the next on our list. Additionally, we selected our top three because they had the highest scores for blocking ads, blocking trackers, and blocking ads that live on social media, among other factors.

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 and Can You Block It. However, we've determined that the best ad blocker for Firefox is Surfshark CleanWeb.

Although NordVPN Threat Protection, AdLock, and uBlock Origin all have their merits, Surfshark offers the best value overall. 

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