{
  "slug": "ublock-origin",
  "category": "ad-blockers",
  "name": "uBlock Origin",
  "description": "Free, open-source content blocker for ads, trackers and malware sites. Efficient, with no \"acceptable ads\" program.",
  "website": "https://github.com/gorhill/uBlock",
  "source": "https://github.com/gorhill/uBlock",
  "license": "GPL-3.0",
  "platforms": [
    "firefox",
    "chromium"
  ],
  "jurisdiction": null,
  "pick": true,
  "pick_reason": "The most effective blocker available, with no data collection, no home server, no acceptable-ads deals and not even a donation page. Install it through the links on its GitHub page to avoid look-alike extensions.",
  "disclosure": null,
  "grade": "B",
  "score": 88,
  "coverage": 100,
  "summary": "uBlock Origin scores 88 out of 100 (grade B) on the ad and tracker blockers criteria. It meets 6 of 7 criteria: open source, no trackers or telemetry, no ads or data sales, effective by default, no browsing data collected and custom filters. It does not meet independent audit.",
  "url": "https://privacyratings.com/ad-blockers/ublock-origin/",
  "markdown": "https://privacyratings.com/ad-blockers/ublock-origin/index.md",
  "answers": {
    "open_source": {
      "title": "Open source",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/gorhill/uBlock/blob/master/LICENSE.txt",
      "note": null
    },
    "no_trackers": {
      "title": "No trackers or telemetry",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/gorhill/uBlock/wiki/Privacy-policy",
      "note": null
    },
    "no_ads": {
      "title": "No ads or data sales",
      "weight": 2,
      "answer": "yes",
      "evidence": "https://github.com/gorhill/uBlock/wiki/Privacy-policy",
      "note": "No ads, no acceptable-ads program, and donations are not accepted."
    },
    "independent_audit": {
      "title": "Independent audit",
      "weight": 2,
      "answer": "no",
      "evidence": null,
      "note": "No independent audit is published."
    },
    "transparency_report": {
      "title": "Transparency report",
      "weight": 2,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "user_notice": {
      "title": "Tells users about requests",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "tls": {
      "title": "TLS configuration",
      "weight": 2,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "security_headers": {
      "title": "Security headers",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "web_standards": {
      "title": "Modern web standards",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "blocks_by_default": {
      "title": "Effective by default",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/gorhill/uBlock#readme",
      "note": null
    },
    "no_data_collection": {
      "title": "No browsing data collected",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/gorhill/uBlock/wiki/Privacy-policy",
      "note": "No data of any kind is collected. The only connections are filter list updates."
    },
    "custom_filters": {
      "title": "Custom filters",
      "weight": 1,
      "answer": "yes",
      "evidence": "https://github.com/gorhill/uBlock/wiki/Dashboard:-My-filters",
      "note": null
    }
  },
  "tests": {
    "ssllabs": null,
    "observatory": null,
    "internetnl_web": null,
    "internetnl_mail": null,
    "trackers": null,
    "tested_at": "2026-10-01T07:00:36.812Z"
  },
  "last_modified": "2026-10-01T07:44:20Z"
}