Security Report Summary
A
Site: https://www.mozilla.org/en-GB/
IP Address: 199.232.27.19
Report Time: 01 Oct 2026 20:11:20 UTC
Headers:
  • Strict-Transport-Security
  • X-Frame-Options
  • Content-Security-Policy
  • X-Content-Type-Options
  • Referrer-Policy
  • Permissions-Policy
Warning: Grade capped at A, please see warnings below.
Advanced:
Great grade! Perform a deeper security analysis of your website and APIs:
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
strict-transport-securitymax-age=31536000
x-frame-optionsDENY
servergranian
content-security-policyform-action 'self' https://abdri3ttkb.execute-api.us-east-2.amazonaws.com https://accounts.firefox.com/ https://basket.mozilla.org; font-src 'self' www.mozilla.org; script-src 'self' 'unsafe-eval' 'unsafe-inline' *.google-analytics.com *.googletagmanager.com cdn.transcend.io google-analytics.com googletagmanager.com js.stripe.com s.ytimg.com tagmanager.google.com transcend-cdn.com www.mozilla.org www.youtube.com; img-src 'self' blog.mozilla.org data: images.ctfassets.net www.google-analytics.com www.googletagmanager.com www.mozilla.org; object-src 'none'; media-src 'self' assets.mozilla.net videos.cdn.mozilla.net www.mozilla.org; connect-src 'self' *.analytics.google.com *.google-analytics.com *.googletagmanager.com analytics.google.com cdn.transcend.io google-analytics.com googletagmanager.com gtm.mozilla.org https://abdri3ttkb.execute-api.us-east-2.amazonaws.com https://accounts.firefox.com/ https://basket.mozilla.org o1069899.ingest.sentry.io o1069899.sentry.io region1.google-analytics.com telemetry.transcend.io telemetry.us.transcend.io transcend-cdn.com www.mozilla.org/submit/bedrock/; frame-src 'self' accounts.firefox.com gtm.mozilla.org js.stripe.com www.google-analytics.com www.googletagmanager.com www.youtube.com; style-src 'self' 'unsafe-inline' cdn.transcend.io transcend-cdn.com www.mozilla.org; upgrade-insecure-requests; base-uri 'none'; frame-ancestors 'none'; default-src 'self' *.mozilla.org
etag"522ea093971371c700844b1dd1764f8d"
x-content-type-optionsnosniff
cache-controlmax-age=600
expiresThu, 01 Oct 2026 20:21:20 GMT
referrer-policystrict-origin-when-cross-origin
content-security-policy-report-onlyform-action 'self' https://abdri3ttkb.execute-api.us-east-2.amazonaws.com https://accounts.firefox.com/ https://basket.mozilla.org; font-src 'self' www.mozilla.org; script-src 'self' 'unsafe-eval' 'unsafe-inline' *.google-analytics.com *.googletagmanager.com cdn.transcend.io google-analytics.com googletagmanager.com js.stripe.com s.ytimg.com tagmanager.google.com transcend-cdn.com www.mozilla.org www.youtube.com; img-src 'self' blog.mozilla.org data: images.ctfassets.net www.google-analytics.com www.googletagmanager.com www.mozilla.org; object-src 'none'; media-src 'self' assets.mozilla.net videos.cdn.mozilla.net www.mozilla.org; connect-src 'self' *.analytics.google.com *.google-analytics.com *.googletagmanager.com analytics.google.com cdn.transcend.io google-analytics.com googletagmanager.com gtm.mozilla.org https://abdri3ttkb.execute-api.us-east-2.amazonaws.com https://accounts.firefox.com/ https://basket.mozilla.org o1069899.ingest.sentry.io o1069899.sentry.io region1.google-analytics.com telemetry.transcend.io telemetry.us.transcend.io transcend-cdn.com www.mozilla.org/submit/bedrock/; frame-src 'self' accounts.firefox.com gtm.mozilla.org js.stripe.com www.google-analytics.com www.googletagmanager.com www.youtube.com; style-src 'self' 'unsafe-inline' cdn.transcend.io transcend-cdn.com www.mozilla.org; upgrade-insecure-requests; base-uri 'none'; frame-ancestors 'none'; default-src 'self' *.mozilla.org
via1.1 google, 1.1 varnish, 1.1 varnish
x-backend-serverbedrock-5f4d8fb59c-xmpkx.gcp-us-west1
content-typetext/html; charset=utf-8
x-clacks-overheadGNU Terry Pratchett
cross-origin-opener-policysame-origin
content-encodinggzip
accept-rangesbytes
age0
dateThu, 01 Oct 2026 20:11:20 GMT
x-served-bycache-dub4338-DUB, cache-dub4338-DUB, cache-dub4343-DUB
x-cacheMISS, MISS
x-cache-hits0, 0
x-timerS1790885480.714232,VS0,VE455
varyAccept-Encoding
content-length21590
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
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.
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.
serverServer value has been changed. Typically you will see values like "Microsoft-IIS/8.0" or "nginx 1.7.2".
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-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".
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.
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.
cross-origin-opener-policyCross-Origin Opener Policy allows a site to opt-in to Cross-Origin Isolation in the browser.