Disable autoscroll UserScript

DisableAutoScroll.js

// ==UserScript==
// @name         Disable Auto Scroll
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Disable mouse middle button completely. As a result it does not activate browser auto scroll. Open hyperlink in a new tab with middle button click still works.
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    document.addEventListener("mousedown", function(mouseEvent) {
        if (mouseEvent.button != 1) {
            return;
        }
        mouseEvent.preventDefault();
        mouseEvent.stopPropagation();
    });
})();