!!! Overview
[{$pagename}] is a [HTTP Response Header] defines allows web site administrators to control [resources] the [User-agent] is allowed to load for a given page. 

With a few exceptions, the [Policy] mostly involve specifying server origins and script [endpoints]. This helps guard against [Cross-site scripting] [attacks] ([XSS]).


!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]