| Strict-Transport-Security | max-age=31536000; includeSubDomains | 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 | frame-ancestors 'self' *.kalshi.com *.kalshi.co coindesk.com *.coindesk.com 270towin.com *.270towin.com sherwood.news *.sherwood.news apple.news *.apple.news yahoo.com *.yahoo.com google.com *.google.com microsoft.com *.microsoft.com msn.com *.msn.com feedly.com *.feedly.com businessinsider.com *.businessinsider.com alltop.com *.alltop.com flipboard.com *.flipboard.com smartnews.com *.smartnews.com allsides.com *.allsides.com dailyhunt.in *.dailyhunt.in newsbreak.com *.newsbreak.com ground.news *.ground.news huffpost.com *.huffpost.com usepanda.com *.usepanda.com getpocket.com *.getpocket.com inoreader.com *.inoreader.com cdcgaming.com *.cdcgaming.com adj.news *.adj.news forex.com *.forex.com bitcoin.com *.bitcoin.com nysun.com thedailybeast.com arcxp.com arcpublishing.com ghost.io *.ghost.io predictionnews.com benzinga.com *.benzinga.com inquirer.com *.inquirer.com covers.com *.covers.com covers-directus.nssmp.com *.covers-directus.nssmp.com | Good | Control resources the user agent is allowed to load for a given page.
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| Referrer-Policy | — | 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 | — | 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 | — | 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 | — | 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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