Security Report Summary
A
Site: https://www.firefox.com/en-GB/channel/desktop/?redirect_source=mozilla-org
IP Address: 151.101.131.19
Report Time: 09 Oct 2026 09:56:55 UTC
Headers:
  • X-Content-Type-Options
  • Content-Security-Policy
  • X-Frame-Options
  • Strict-Transport-Security
  • Referrer-Policy
  • Permissions-Policy
Warning: Grade capped at A, please see warnings below.
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Missing Headers
Permissions-PolicyPermissions Policy is a new header that allows a site to control which features and APIs can be used in the browser.
Warnings
Content-Security-PolicyThis policy contains 'unsafe-inline' which is dangerous in the script-src directive. This policy contains 'unsafe-eval' which is dangerous in the script-src directive.
Raw Headers
HTTP/2200
content-languageen-GB
x-clacks-overheadGNU Terry Pratchett
cross-origin-opener-policysame-origin
x-content-type-optionsnosniff
content-security-policy-report-onlyupgrade-insecure-requests; media-src 'self' assets.mozilla.net videos.cdn.mozilla.net www.firefox.com www.mozilla.org; font-src 'self' www.firefox.com; frame-src 'self' accounts.firefox.com https://gtm.firefox.com www.google-analytics.com www.googletagmanager.com www.youtube-nocookie.com www.youtube.com; script-src 'self' 'unsafe-eval' 'unsafe-inline' *.google-analytics.com *.googletagmanager.com google-analytics.com googletagmanager.com https://gtm.firefox.com pa.firefox.com s.ytimg.com tagmanager.google.com www.firefox.com www.youtube.com; connect-src 'self' *.analytics.google.com *.google-analytics.com *.googletagmanager.com analytics.google.com basket.mozilla.org google-analytics.com googletagmanager.com gtm.firefox.com https://accounts.firefox.com/ https://basket.mozilla.org https://gtm.firefox.com o1069899.ingest.sentry.io o1069899.ingest.us.sentry.io o1069899.sentry.io pa.firefox.com www.firefox.com; object-src 'none'; form-action 'self' https://accounts.firefox.com/ https://basket.mozilla.org; img-src 'self' *.google-analytics.com *.googletagmanager.com data: google-analytics.com googletagmanager.com https://gtm.firefox.com www.firefox.com www.mozilla.org; base-uri 'none'; frame-ancestors 'none'; style-src 'self' www.firefox.com; default-src 'self' www.firefox.com
content-security-policyupgrade-insecure-requests; media-src 'self' assets.mozilla.net videos.cdn.mozilla.net www.firefox.com www.mozilla.org; font-src 'self' www.firefox.com; frame-src 'self' accounts.firefox.com https://gtm.firefox.com www.google-analytics.com www.googletagmanager.com www.youtube-nocookie.com www.youtube.com; script-src 'self' 'unsafe-eval' 'unsafe-inline' *.google-analytics.com *.googletagmanager.com google-analytics.com googletagmanager.com https://gtm.firefox.com pa.firefox.com s.ytimg.com tagmanager.google.com www.firefox.com www.youtube.com; connect-src 'self' *.analytics.google.com *.google-analytics.com *.googletagmanager.com analytics.google.com basket.mozilla.org google-analytics.com googletagmanager.com gtm.firefox.com https://accounts.firefox.com/ https://basket.mozilla.org https://gtm.firefox.com o1069899.ingest.sentry.io o1069899.ingest.us.sentry.io o1069899.sentry.io pa.firefox.com www.firefox.com; object-src 'none'; form-action 'self' https://accounts.firefox.com/ https://basket.mozilla.org; img-src 'self' *.google-analytics.com *.googletagmanager.com data: google-analytics.com googletagmanager.com https://gtm.firefox.com www.firefox.com www.mozilla.org; base-uri 'none'; frame-ancestors 'none'; style-src 'self' www.firefox.com; default-src 'self' www.firefox.com
x-frame-optionsDENY
strict-transport-securitymax-age=31536000
x-backend-serverspringfield-7fbbd57687-g8d82.gcp-eu-west1
cache-controlmax-age=600
content-typetext/html; charset=utf-8
referrer-policystrict-origin-when-cross-origin
etag"4eefa7be5eb9752e560d2902c0789ffc"
via1.1 google, 1.1 varnish, 1.1 varnish
expiresFri, 09 Oct 2026 10:06:55 GMT
servergranian
content-encodinggzip
accept-rangesbytes
age0
dateFri, 09 Oct 2026 09:56:55 GMT
x-served-bycache-dub4379-DUB, cache-dub4379-DUB, cache-dub4327-DUB
x-cacheMISS, MISS
x-cache-hits0, 0
x-timerS1791539815.423359,VS0,VE270
varyorigin, Accept-Encoding
content-length17468
Upcoming Headers
Cross-Origin-Embedder-PolicyCross-Origin Embedder Policy allows a site to prevent assets being loaded that do not grant permission to load them via CORS or CORP.
Cross-Origin-Resource-PolicyCross-Origin Resource Policy allows a resource owner to specify who can load the resource.
Additional Information
cross-origin-opener-policyCross-Origin Opener Policy allows a site to opt-in to Cross-Origin Isolation in the browser.
x-content-type-optionsX-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. The only valid value for this header is "X-Content-Type-Options: nosniff".
content-security-policy-report-onlyContent Security Policy Report Only is used to test a Content Security Policy before making it live. The browser will report on actions that would have been taken based on the policy. Analyse this policy in more detail. You can sign up for a free account on Report URI to collect reports about problems on your site.
content-security-policyContent Security Policy is an effective measure to protect your site from XSS attacks. By whitelisting sources of approved content, you can prevent the browser from loading malicious assets. Analyse this policy in more detail. You can sign up for a free account on Report URI to collect reports about problems on your site.
x-frame-optionsX-Frame-Options tells the browser whether you want to allow your site to be framed or not. By preventing a browser from framing your site you can defend against attacks like clickjacking.
strict-transport-securityHTTP Strict Transport Security is an excellent feature to support on your site and strengthens your implementation of TLS by getting the User Agent to enforce the use of HTTPS.
referrer-policyReferrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites.
serverServer value has been changed. Typically you will see values like "Microsoft-IIS/8.0" or "nginx 1.7.2".