| Strict-Transport-Security | max-age=15552000; includeSubDomains | 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 | frame-ancestors 'self' www.seznam.cz share.seznam.cz search.seznam.cz www.google.cz www.google.com *.seznamakce.cz www.novinky.cz admin.novinky.cz *.novinky.cz; script-src 'self' 'unsafe-inline' 'unsafe-eval' *.sdn.szn.cz *.sdn.cz gacz.hit.gemius.pl scz.hit.gemius.pl www.google-analytics.com https://www.googletagmanager.com/gtag/js cdn-gl.imrworldwide.com *.twitter.com *.twimg.com *.facebook.net *.facebook.com *.instagram.com *.tiktok.com *.ttwstatic.com https://www.gstatic.com https://ajax.googleapis.com login.szn.cz http://login.szn.cz https://login.szn.cz notifikace.seznam.cz http://notifikace.seznam.cz https://notifikace.seznam.cz *.adform.net *.adnxs.com *.adnxs-simple.com *.adsafeprotected.com *.consensu.org *.doubleclick.net *.doubleverify.com *.googlesyndication.com *.googletagservices.com *.im.cz *.imedia.cz *.imedia.dev.dszn.cz *.pliing.com *.pubmatic.com *.sbeta.cz *.sdn.szn.cz *.serving-sys.com *.seznam.cz *.sklik.cz ads.celtra.com *.2mdn.net ams.creativecdn.com cdn.id5-sync.com tags.crwdcntrl.net *.novinky.cz https://www.novinky.cz | Good | Control resources the user agent is allowed to load for a given page.
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| Referrer-Policy | origin | 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 | — | 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 | unsafe-none | 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 | same-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 | 0 | 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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