Strict-Transport-Security max-age =63072000; includeSubDomains ; preload Good Declare that a website is only accessible over a secure connection (HTTPS). X-Frame-Options DENY Good Indicate whether a browser should be allowed to render a page in a <frame>, <iframe>, <embed> or <object>. X-Content-Type-Options nosniff Good Indicate that the MIME types advertised in the Content-Type headers should be followed and not be changed. Content-Security-Policy default-src 'none'; media-src *; font-src 'self' *.typekit.net *.cloudfront.net fonts.gstatic.com data:; img-src * data:; script-src 'self' 'unsafe-inline' 'unsafe-eval' boards.greenhouse.io substackapi.com boards.greenhouse.io cdn.jsdelivr.net cdn.optimizely.com *.parsely.com connect.facebook.net info.a16z.com munchkin.marketo.net plausible.io px.ads.linkedin.com snap.licdn.com static.ads-twitter.com www.youtube.com script.crazyegg.com www.google-analytics.com www.googletagmanager.com a16z.com blob:; style-src 'unsafe-inline' *.typekit.net fonts.googleapis.com info.a16z.com a16z.com; connect-src *; frame-src 'self' *.loom.com *.cdn.optimizely.com *.simplecast.com gamma.app boards.greenhouse.io www.youtube.com info.a16z.com; base-uri 'none'; form-action 'self' info.a16z.com; frame-ancestors 'self'Good Control resources the user agent is allowed to load for a given page. Referrer-Policy — Good Control how much referrer information should be included with requests. Clear-Site-Data — Good Control the data stored by a client browser for their origins. 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. Permissions-Policy — New Allow and deny the use of browser features in a document or iframe. Cross-Origin-Embedder-Policy — New Configure embedding cross-origin resources into the document. Cross-Origin-Opener-Policy — New Ensure a top-level document does not share a browsing context group with cross-origin documents. Cross-Origin-Resource-Policy — New Request that the browser blocks no-cors cross-origin/cross-site requests to the given resource. X-XSS-Protection 0 Deprecated Deprecated. Stops pages from loading when they detect reflected cross-site scripting (XSS) attacks. Feature-Policy — Deprecated Deprecated. Replaced by the Permissions-Policy header. Expect-CT — Deprecated Deprecated. Opt in to reporting and/or enforcement of Certificate Transparency requirements. Public-Key-Pins — Deprecated Deprecated. Allows HTTPS websites to resist impersonation by attackers using mis-issued or otherwise fraudulent certificates.