Strict-Transport-Security | max-age=31536000; includeSubDomains; preload | Good | Declare that a website is only accessible over a secure connection (HTTPS).
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X-Frame-Options | SAMEORIGIN | Good | Indicate whether a browser should be allowed to render a page in a <frame>, <iframe>, <embed> or <object>.
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X-Content-Type-Options | nosniff | Good | Indicate that the MIME types advertised in the Content-Type headers should be followed and not be changed.
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Content-Security-Policy | default-src 'self'; base-uri 'self'; block-all-mixed-content; font-src 'self' https: data:; frame-ancestors 'self'; img-src 'self' data:; object-src 'none'; script-src 'self'; script-src-attr 'none'; style-src 'self' https: 'unsafe-inline'; upgrade-insecure-requests
default-src 'none'; font-src 'self'; script-src 'self' blob:; manifest-src 'self'; media-src 'self' data: blob: about:; style-src 'self' 'unsafe-inline'; base-uri 'none'; img-src 'self' data:; form-action 'self'; frame-ancestors 'none'; connect-src 'self'; worker-src blob:; | Good | Control resources the user agent is allowed to load for a given page.
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Referrer-Policy | no-referrer | Good | Control how much referrer information should be included with requests.
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Clear-Site-Data | — | Good | Control the data stored by a client browser for their origins.
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X-Permitted-Cross-Domain-Policies | — | Good | Control whether a web client such as Adobe Flash Player or Adobe Acrobat has permission to handle data across domains.
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Permissions-Policy | accelerometer=(); ambient-light-sensor=(); autoplay=(); camera=(); encrypted-media=(); focus-without-user-activation=(); geolocation=(); gyroscope=(); magnetometer=(); microphone=(); midi=(); payment=(); picture-in-picture=(); speaker=(); usb=(); vr=() | New | Allow and deny the use of browser features in a document or iframe.
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Cross-Origin-Embedder-Policy | — | New | Configure embedding cross-origin resources into the document.
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Cross-Origin-Opener-Policy | — | New | Ensure a top-level document does not share a browsing context group with cross-origin documents.
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Cross-Origin-Resource-Policy | — | New | Request that the browser blocks no-cors cross-origin/cross-site requests to the given resource.
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X-XSS-Protection | 1; mode=block | Deprecated | Deprecated. Stops pages from loading when they detect reflected cross-site scripting (XSS) attacks.
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Feature-Policy | accelerometer 'none'; ambient-light-sensor 'none'; autoplay 'none'; camera 'none'; encrypted-media 'none'; focus-without-user-activation 'none'; geolocation 'none'; gyroscope 'none'; magnetometer 'none'; microphone 'none'; midi 'none'; payment 'none'; picture-in-picture 'none'; speaker 'none'; usb 'none'; vr 'none' | Deprecated | Deprecated. Replaced by the Permissions-Policy header.
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Expect-CT | — | Deprecated | Deprecated. Opt in to reporting and/or enforcement of Certificate Transparency requirements.
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Public-Key-Pins | — | Deprecated | Deprecated. Allows HTTPS websites to resist impersonation by attackers using mis-issued or otherwise fraudulent certificates.
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