A snapshot of everything your browser sends to every site you visit — useful for verifying a VPN connection or just learning what you leave behind.
Every site you visit can see most of these fields — and combine them with cookies or fingerprinting to track you across sessions. A VPN hides the public IP and (if it does its job) sets a new "country", but the browser-side fields are unchanged. Use this page to verify the IP swap and see what is still identifiable.
Nothing. The data is pulled from request headers your browser already sent and rendered back at you — no logging, no cookies, no third-party calls. Reload the page and it is gone.