Follow along with the video below to see how to install our site as a web app on your home screen.
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you may add as many additional headers for your domain(s), that you wish to. For such ( unique ) configurations, you have the option to use "Additional directives" over your Plesk Control Panel, at :
no, there is no official Plesk documentation to achieve your goal.
But you could use the link at the feature request ( =>HPKP: HTTP Public Key Pinning ) in addition with the Plesk documentations: