| Strict-Transport-Security | max-age=315360000; includeSubDomains; preload | Good | Declare that a website is only accessible over a secure connection (HTTPS).
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| X-Frame-Options | — | 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' https:; img-src https: data:; style-src https: chrome: 'sha256-R5o0c2W6sdXkPgWe5N/6Vl+OQHsLAv++2DuKSAY03Dw=' 'sha256-TJWjzDONyOvyPEjND6ryqHZEKY2qnPlHJWVzYmB0lnY='; script-src 'self' https://mirror.explodie.org https://platform.twitter.com https://cdn.syndication.twimg.com moz-extension: chrome-extension:; script-src-elem 'self' https://mirror.explodie.org https://platform.twitter.com moz-extension: chrome-extension:; script-src-attr 'none'; object-src 'none'; connect-src 'self' https://syndication.twitter.com; frame-src https://platform.twitter.com https://syndication.twitter.com https://twitter.com; upgrade-insecure-requests; block-all-mixed-content; frame-ancestors 'none'; font-src 'self' https:; | 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 | none | 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 | geolocation=(self); midi=(); notifications=(); push=(); sync-xhr=(); microphone=(); camera=(); magnetometer=(self); gyroscope=(self); speaker=(self "https://mirror.explodie.org"); vibrate=(); fullscreen=(self); payment=(); interest-cohort=(); web-share=(self); idle-detection=(); browsing-topics=() | 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 | same-origin | 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 | cross-origin | 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 | — | Deprecated | Deprecated. Replaced by the Permissions-Policy header.
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| Expect-CT | enforce; max-age=3600 | 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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