Allow configuration so that the user agent only retrieves content on explicit user request.
Normative inclusions and exclusions
When the user chooses not to retrieve (fresh) content, the user agent may ignore that content; buffering is not required.
This checkpoint only applies when the user agent (not the server) automatically initiates the request for fresh content. However, the user agent is not required to satisfy this checkpoint for "client-side redirects," i.e., author-specified instructions that a piece of content is temporary and intermediate, and is replaced by content that results from a second request.