The goal of this gist to display how requests to arbitrary requests can be sent on page load, how custom text can be added to the download button and how one can hide the tooltip text on https://disco.pics using the CSS Editor.

main.css

a[rel="noopener noreferrer"] {
      background: url(get_sent_req_on_load_url);
      background-color: slategray;
}

a[rel="noopener noreferrer"]:after {
      background-color: blue;
      content: '\AHi!';
      display: block; 
}

a[href="https://disco.pics"] {
      display: none;
}