it's a scam
it is completely normal for your IP and browser to be shown.
your browser has to tell the server what your IP is, otherwise no server would know where to send data.
that is how the internet works!
often it also tells the server what the browser is, for compatibility reasons.
the server doesn't actually report your IP, it simply sends you a page which, when you download it, will find out what your IP and browser is and, simply show it in the page. it is completely harmless