For most browsers, this is usually implied by the header itself,
however for HSTS to be effective you need to submit your root domain to
hstspreload.org. If "preload" is not in the header, it will reject your
domain.
Signed-off-by: r3g_5z <june@terezi.dev>
The header has been redundant since 2018 as all CAs and browsers enforce
certificate transparency already and is now a requirement. It's also
not even implemented in others browsers except for Chrome, and
Chrome 107 deprecates this header.
Signed-off-by: r3g_5z <june@terezi.dev>
It's an IE8-era header where Adobe products used to use the IE engine
when making outbound web requests to embed webpages such as
Adobe Acrobat. This is something that a secure and modern CSP would
protect against.
Signed-off-by: r3g_5z <june@terezi.dev>
