a userscript that hides the header and footer when "media: print" on fosdem.org

fosdem_noprint_headerfooter.user.js

// ==UserScript==
// @name        fosdem.org: hide header/footer in "media: print"
// @namespace   com.dsprenkels.fosdem_bprint
// @include     https://fosdem.org/*
// @version     1
// @grant       none
// ==/UserScript==

var elem = document.createElement("style");
elem.setAttribute("type", "text/css");
elem.setAttribute("media", "print");
elem.innerHTML = "#header, .title-box, #footer { display: none; }";
document.head.appendChild(elem);