unfix-all-the-toolbars.greasemonkey.js

// ==UserScript==
// @name        unfix-all-the-toolbars
// @namespace   http://inf.ufrgs.br/~vbuaraujo/
// @include     *
// @version     1
// @grant       none
// ==/UserScript==


// Based on https://stackoverflow.com/questions/13696100/greasemonkey-script-to-make-fixed-positioned-elements-static

function unfixAll(){
  Array.forEach(
    document.querySelectorAll("h1, h2, ul, ol, li, div, nav"),
    function (el) {
      console.log("unfixAllTheToolbars: visited one");
      if (window.getComputedStyle(el).position === "fixed") {
        el.style.position = "absolute";
        console.log("unfixAllTheTollbars: replaced one")
      }
    });
}

window.addEventListener("load", unfixAll);