{
  "slug": "firefox-private-relay",
  "category": "email-forwarding",
  "name": "Firefox Private Relay",
  "description": "Email masking service from Mozilla that creates aliases and forwards mail to a real inbox. Works on the web and through a Firefox add-on.",
  "website": "https://relay.firefox.com",
  "source": "https://github.com/mozilla/fx-private-relay",
  "license": null,
  "platforms": [],
  "jurisdiction": {
    "code": "US",
    "name": "United States",
    "eyes": "Five Eyes",
    "eu": false,
    "gdpr": false,
    "cloud_act": "provider"
  },
  "pick": false,
  "pick_reason": null,
  "disclosure": null,
  "grade": "F",
  "score": 33,
  "coverage": 100,
  "summary": "Firefox Private Relay scores 33 out of 100 (grade F) on the email forwarding and aliases criteria. It meets 4 of 16 criteria: open source, no ads or data sales, transparency report and tells users about requests. It partly meets TLS configuration and no stored mail. It does not meet no trackers or telemetry, independent audit, security headers, end-to-end encryption, open protocols, custom domains, sign up without personal data, mail transport security, Sender Rewriting Scheme and ARC sealing. It is based in the United States: Five Eyes member; subject to the US CLOUD Act. Automated tests: SSL Labs grade A- and Mozilla HTTP Observatory grade C+.",
  "url": "https://privacyratings.com/email-forwarding/firefox-private-relay/",
  "markdown": "https://privacyratings.com/email-forwarding/firefox-private-relay/index.md",
  "answers": {
    "open_source": {
      "title": "Open source",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/mozilla/fx-private-relay/blob/main/LICENSE",
      "note": "MPL-2.0."
    },
    "no_trackers": {
      "title": "No trackers or telemetry",
      "weight": 3,
      "answer": "no",
      "evidence": "https://github.com/mozilla/fx-private-relay/blob/main/METRICS.md",
      "note": "The Relay website and extension use Google Analytics unless the browser sends Do Not Track."
    },
    "no_ads": {
      "title": "No ads or data sales",
      "weight": 2,
      "answer": "yes",
      "evidence": "https://relay.firefox.com/premium/",
      "note": "Funded by the Premium subscription. Relay shows no ads."
    },
    "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": "yes",
      "evidence": "https://www.mozilla.org/en-US/about/policy/transparency/",
      "note": "Mozilla publishes counts of government and legal requests for user data twice a year."
    },
    "user_notice": {
      "title": "Tells users about requests",
      "weight": 1,
      "answer": "yes",
      "evidence": "https://www.mozilla.org/en-US/about/policy/transparency/",
      "note": "Mozilla notifies affected users of requests unless legally prohibited, and after any required delay ends."
    },
    "tls": {
      "title": "TLS configuration",
      "weight": 2,
      "answer": "partial",
      "evidence": "https://www.ssllabs.com/ssltest/analyze.html?d=relay.firefox.com&hideResults=on",
      "note": "Grade A-"
    },
    "security_headers": {
      "title": "Security headers",
      "weight": 1,
      "answer": "no",
      "evidence": "https://developer.mozilla.org/en-US/observatory/analyze?host=relay.firefox.com",
      "note": "Grade C+ (60/100+)"
    },
    "web_standards": {
      "title": "Modern web standards",
      "weight": 1,
      "answer": "pending",
      "evidence": null,
      "note": "Not tested yet."
    },
    "e2ee": {
      "title": "End-to-end encryption",
      "weight": 2,
      "answer": "no",
      "evidence": null,
      "note": "Not supported. Relay has no PGP or other end-to-end encryption for forwarded mail."
    },
    "no_mail_storage": {
      "title": "No stored mail",
      "weight": 3,
      "answer": "partial",
      "evidence": "https://www.mozilla.org/en-US/privacy/subscription-services/#relay",
      "note": "Mail is not stored after delivery. Undeliverable mail is kept for up to three days."
    },
    "open_protocols": {
      "title": "Open protocols",
      "weight": 2,
      "answer": "no",
      "evidence": null,
      "note": "No IMAP or SMTP access. Mail is forwarded to an existing inbox and replies go through the mask."
    },
    "custom_domains": {
      "title": "Custom domains",
      "weight": 1,
      "answer": "no",
      "evidence": "https://relay.firefox.com/premium/",
      "note": "Own domains are not supported. Premium offers a custom subdomain of mozmail.com."
    },
    "anonymous_signup": {
      "title": "Sign up without personal data",
      "weight": 2,
      "answer": "no",
      "evidence": null,
      "note": "A Mozilla account with an existing email address is required."
    },
    "mail_standards": {
      "title": "Email security standards",
      "weight": 2,
      "answer": "pending",
      "evidence": null,
      "note": "Not tested yet."
    },
    "transport_security": {
      "title": "Mail transport security",
      "weight": 3,
      "answer": "no",
      "evidence": null,
      "note": "Passes: SPF, DMARC quarantine. Missing: MTA-STS missing, TLS-RPT, DNSSEC, DANE none."
    },
    "srs": {
      "title": "Sender Rewriting Scheme",
      "weight": 2,
      "answer": "no",
      "evidence": null,
      "note": "No published documentation on SRS for forwarded mail."
    },
    "arc": {
      "title": "ARC sealing",
      "weight": 1,
      "answer": "no",
      "evidence": null,
      "note": "No published documentation on ARC signing or validation."
    }
  },
  "tests": {
    "ssllabs": "A-",
    "observatory": "C+",
    "internetnl_web": null,
    "internetnl_mail": null,
    "trackers": [],
    "tested_at": "2026-10-01T11:00:24.901Z"
  },
  "last_modified": "2026-10-01T11:14:42Z"
}