uBlock Origin vs Privacy Badger: Which Should You Install?

Install both. uBlock Origin blocks all known trackers and ads from curated community filter lists — it's the stronger, broader blocker. Privacy Badger adds behavioral learning that catches new trackers not yet on any public list. They don't conflict. Running both gives you list-based coverage (uBlock) plus adaptive detection (Privacy Badger) with minimal performance cost. If you can only install one: uBlock Origin.

Last verified: May 26, 2026 · Reading time: 6 min

TL;DR

• If you install only one: uBlock Origin — broader coverage, better performance, eliminates ads too.
• If you want maximum protection: Both — uBlock for lists, Privacy Badger for behavioral detection of new trackers.
• Both are free and open source. uBlock Origin is maintained by Raymond Hill; Privacy Badger by the EFF.
• uBlock Origin on Firefox is the most capable combination as of May 2026 — Chrome’s extension restrictions have slightly reduced uBlock’s effectiveness on Chrome since Manifest V3.

The verdict table

Feature	uBlock Origin	Privacy Badger
Blocks known trackers	✓ (from community lists)	✓ (learned behavioral)
Blocks new/unknown trackers	Limited (list must update)	✓ (behavioral learning)
Blocks ads	✓	— (by design)
Blocks YouTube ads	✓	—
Filter lists	Community-maintained (EasyList, etc.)	Self-generated from browsing
Learning period	None (instant)	10+ days of browsing data
Performance impact	Very low	Low
Chrome support	✓ (reduced by MV3)	✓
Firefox support	✓ (full MV2 capability)	✓
Maintained by	Raymond Hill (gorhill)	Electronic Frontier Foundation

How they block — the fundamental difference

uBlock Origin uses curated block lists — large, community-maintained databases of known tracking domains. When you visit a page, uBlock compares every resource request against these lists. Resources matching known tracker domains are blocked before they load. This approach is fast, comprehensive for known threats, and zero-knowledge-required to configure.

The limitation: Lists only know about trackers that have already been identified and added. New tracking domains, novel fingerprinting techniques, or trackers operated by sites you’ve whitelisted won’t be on the list.

Privacy Badger uses behavioral detection — it watches how third-party domains behave across websites as you browse. If it sees the same third-party domain appearing on three or more unrelated sites with tracking behavior, it blocks it. No pre-existing list is consulted — Privacy Badger figures out tracking patterns from observation.

The limitation: Privacy Badger learns from your browsing. It takes 10–14 days of normal browsing before it has meaningful data. On day one, it blocks very little. On day 30, it’s caught many trackers specific to the sites you visit.

Where uBlock Origin wins

Breadth. uBlock Origin’s filter lists cover millions of tracking domains, advertisers, and malware hosts. This coverage is immediately effective from day one of installation. Privacy Badger starts with no data.

Ad blocking. Privacy Badger deliberately doesn’t block ads as a category — it only blocks ads that also track across sites. uBlock Origin blocks all ads by default (EasyList is included in the default configuration). If you want YouTube without ads, Reddit without promoted posts, and news sites without banner ads, uBlock Origin does this; Privacy Badger does not.

Performance. uBlock Origin consistently benchmarks as the lowest-memory tracker blocker in its category — under 60MB of RAM on most systems. Privacy Badger’s behavioral analysis is slightly more expensive but still low-impact.

Firefox advantage. Chrome’s Manifest V3 extension policy (fully enforced in 2024) limits how extensions can intercept network requests, reducing uBlock Origin’s effectiveness slightly. On Firefox, uBlock Origin runs on Manifest V2 with full capabilities. For maximum tracker blocking, Firefox + uBlock Origin is the strongest available combination as of May 2026.

Where Privacy Badger adds value

Novel tracker detection. If a company launches a new tracking pixel not yet on any public block list, Privacy Badger catches it behaviorally. uBlock Origin won’t block it until someone adds it to a list, which can take days or weeks.

First-party-ish tracking patterns. Some tracking happens through domains that look like legitimate content delivery but are actually owned by the same company for cross-site tracking. Privacy Badger’s behavioral approach can catch these even when they’re not on a simple domain block list.

Heuristic learning specific to your browsing. Over time, Privacy Badger builds a picture of your specific browsing patterns and the trackers that follow you specifically — not just the generic tracker landscape.

Do they conflict?

No. Both extensions operate by blocking or modifying network requests — they don’t interfere with each other’s logic. uBlock Origin blocks from its lists; Privacy Badger blocks from its learned data. When both block the same tracker, they simply both block it (no duplication problem). When they block different trackers, your coverage is the union of both.

The only potential issue: Privacy Badger includes a feature to check if uBlock Origin is installed and may defer to it for some decisions. This is a designed cooperation feature, not a conflict.

What about DuckDuckGo Privacy Essentials?

DuckDuckGo Privacy Essentials is a third option. It combines tracker blocking with HTTPS enforcement, email protection, and the DuckDuckGo search integration. Its tracker blocking is less comprehensive than uBlock Origin’s lists and less adaptive than Privacy Badger’s behavioral approach. It’s the right choice for users who want one simple extension that does several privacy-related things — not for users who want maximum tracker blocking.

The practical setup

Minimum: Install uBlock Origin. Use Firefox for maximum effectiveness. Change nothing from the default configuration — it works well out of the box.

Recommended: Install both uBlock Origin and Privacy Badger. Let Privacy Badger learn for two weeks. No configuration required for either.

Power user: uBlock Origin on Firefox with EasyList, EasyPrivacy, uBlock Origin Filters, and Peter Lowe’s ad server list (all included in default configuration). Add the “Annoyances” filter list to remove cookie banners.

Both extensions are free and open source. Neither pays us a commission — this recommendation is based purely on capability.