Privacy Badger vs uBlock Origin: Tracker Blocker Comparison

What Each Tool Does

Privacy Badger is a browser extension that stops advertisers and other third-party trackers from secretly tracking where you go and what pages you look at on the web. Its approach is behavioral: it keeps track of the third-party domains that embed images, scripts and advertising in pages you visit and looks for tracking techniques like uniquely identifying cookies, local storage "supercookies," and canvas fingerprinting.

uBlock Origin is a lightweight, open-source content blocker created by Raymond Hill that blocks network requests before they load, stopping trackers, fingerprinting scripts, cryptominers, and malware domains outright. Rather than learning, it relies on filter lists, sets of rules that tell the extension what to block and are updated frequently and maintained by the community.

Key Differences: Learning vs. Lists

The fundamental split between these tools comes down to methodology. uBlock Origin uses manually compiled ad blocker lists, while Privacy Badger automatically learns using heuristics.

This distinction matters. Privacy Badger learns which domains track you by watching their behavior across sites, then blocks them automatically, while uBlock Origin uses pre-built filter lists to block known ads, trackers, and malicious domains on sight. uBlock Origin blocks more overall but Privacy Badger catches trackers that haven't made it onto any list yet.

In practice, Privacy Badger observes how websites behave, then blocks only the most intrusive elements while allowing legitimate functions to proceed. This means fewer false positives—fewer broken websites. However, Privacy Badger needs time to learn what tracks you, so it may not seem to block anything initially.

Ad Blocking: A Critical Difference

Here's where the tools diverge most visibly: Privacy Badger's main goal is to block trackers, while uBlock Origin's main goal is to block ads plus trackers.

Privacy Badger only blocks those ads which come with embedded trackers. This means if an ad doesn't track you across sites, Privacy Badger lets it through. For comprehensive ad blocking, you need uBlock Origin or similar.

uBlock Origin, by contrast, is designed as a comprehensive content blocker. It can block follow-along video ads, display ads, banner ads, pop-up ads, and error trackers and mute notifications.

Who Made Them?

Knowing the developers matters when you're trusting a tool with your browsing data. Privacy Badger is a free and open-source browser extension created by the Electronic Frontier Foundation (EFF). The EFF is a nonprofit focused on digital rights, which is why Privacy Badger exists: to fight corporate surveillance and take back control of user data.

uBlock Origin is a lightweight, open-source content blocker created by Raymond Hill. uBlock Origin remains independent and does not allow ads for payment. The project refuses donations and instead advises supporters to donate to maintainers of block lists.

Browser Support and Performance

Both tools run on the major browsers, but with caveats. Privacy Badger is available for Google Chrome, Mozilla Firefox, Edge, Brave, Opera, and Firefox for Android.

uBlock Origin's situation is more complex due to Chrome's Manifest V3 restrictions. uBlock Origin Lite (uBOL) is Raymond Hill's content blocker built for Manifest V3, the extension platform used by current Chrome, using browser-managed filtering rules. Full uBlock Origin offers more filtering capabilities and advanced controls with the strongest support on Firefox.

When it comes to resource usage, uBlock Origin blocks 99.8% of ads and trackers on mainstream sites while using less than 15MB RAM and adding less than 3ms latency per page load.

Additional Privacy Features

Privacy Badger sends the Global Privacy Control signal to opt you out of data sharing and selling, and the Do Not Track signal to tell companies not to track you. If trackers ignore these signals, Privacy Badger will learn to block them.

Beyond simple blocking, Privacy Badger's widget replacement feature blocks certain potentially useful widgets and replaces them with placeholders, protecting privacy by default while letting you restore the original widget whenever you want it or need it for the page to function.

Should You Use Both Together?

You can use both together technically, but it is largely redundant since uBlock Origin already blocks trackers via filter lists. Running both adds minimal benefit and uses more resources.

uBlock Origin is not a replacement for Privacy Badger (nor is Privacy Badger a replacement for uBlock Origin), as uBlock Origin uses manually compiled ad blocker lists while Privacy Badger automatically learns using heuristics. Both approaches have their strengths and weaknesses.

Which One Should You Choose?

Your choice depends on your priorities.

Choose Privacy Badger if you primarily care about blocking hidden trackers and want an extension that works immediately without configuration. Its adaptive learning catches novel trackers that haven't appeared in filter lists yet, and its focus means fewer broken websites.

Choose uBlock Origin if you want comprehensive content blocking. It blocks both ads and trackers, handles YouTube ads (a major difference), and works immediately upon install. It's more customizable for power users and requires fewer browser resources.

For Firefox users specifically, uBlock Origin is ranked 1st while Privacy Badger is ranked 9th among Firefox add-ons. For Chrome users, Privacy Badger offers full features while uBlock Origin is limited to Lite mode.

Both are free, both are trustworthy, and both genuinely work. The best choice comes down to whether you need comprehensive ad blocking (uBlock Origin) or focused tracker blocking with minimal false positives (Privacy Badger).