# EFForg/privacybadger

Privacy Badger is a browser extension that automatically learns to block hidden trackers

Repository: https://github.com/EFForg/privacybadger
Canonical: https://ross.abutalabs.com/products/privacybadger
Homepage: https://privacybadger.org
Language: JavaScript
License: NOASSERTION
License Family: other
Topics: privacy, javascript, webextension, tracking, cookies, fingerprinting, browser-fingerprinting, chrome-extension, firefox-extension
Last push: 2026-08-25T23:02:53+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 84, longevity 100
- inputs: {"age_days": 4802, "days_push": 8, "days_rel": 26, "gap_med": 48, "n_releases_24m": 12}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3822, forks 433 (observed 2026-08-28T04:08:21.528290+00:00)

## What it is
Privacy Badger is a free browser extension by EFF that automatically learns to block hidden third-party trackers as you browse. It sends Global Privacy Control and Do Not Track signals, blocks trackers that ignore them, and includes features like widget replacement and link cleaning.

## Use cases
- block hidden trackers while browsing
- stop companies from spying on me online
- send Do Not Track and Global Privacy Control signals
- prevent browser fingerprinting
- clean tracking parameters from Facebook and Google links
- replace social media widgets with click-to-activate placeholders
- block third-party cookies from trackers

## When to choose
- you want automatic, heuristic-based tracker blocking without maintaining blocklists
- you want a privacy extension from a trusted nonprofit (EFF)
- you want GPC and DNT signals sent to websites
- you use Chrome, Firefox, Edge, Opera, or Brave

## When to avoid
- you want comprehensive ad blocking with cosmetic filtering (use uBlock Origin instead)
- you need tracker blocking outside the browser
- you need a mobile system-wide privacy solution

## Facets
- artifact type: plugin
- maturity: active
- function: security, privacy, browser-extension
- domain: privacy, browser-extensions, security, web-development
- platform: browser, browser-extension, cross-platform
- tags: tracker-blocking, ad-blocking, do-not-track, global-privacy-control, browser-fingerprinting, eff, webextension, cookie-blocking

## Member repositories
- EFForg/privacybadger (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:21.528290+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:26:23.868758+00:00, confidence not recorded.
  - readme: https://github.com/EFForg/privacybadger (fetched 2026-08-28T04:08:21.528290+00:00, sha b1bebfe27db1)
  - homepage: https://privacybadger.org (fetched 2026-08-29T09:21:19.428856+00:00, sha 44c97988ecf1)
- Data as of 2026-08-30T08:39:29.467469+00:00.