> Contains a space-separated list of URLs to which, when the hyperlink is followed, POST requests with the body PING will be sent by the browser (in the background). Typically used for tracking.
Does this mean that if I put a proxy between the browser and the internet I can block this kind of requests? (of course at the expense of requests that contain that same body for other reasons, in which case I wonder why they didn't add a specific http request header to clearly mark those requests as pings)