1.user.js

// ==UserScript==
// @name        Auto-Refresh
// @version     0.2
// @description Checks inactivity on the setted page, then reload the page after setted time interval.
// @icon        https://image.flaticon.com/icons/svg/189/189687.svg
// /* Icon made by Roundicons from www.flaticon.com */
// @homepageURL https://github.com/perdolka/Auto-Refresh
// @downloadURL https://raw.githubusercontent.com/perdolka/Auto-Refresh/master/1.user.js
// @updateURL   https://raw.githubusercontent.com/perdolka/Auto-Refresh/master/1.user.js
// @include     https://sample.com/ - put your site(s) here and remove this message

// ==/UserScript==

(function () 
{ 
    var minutes = true; // false=seconds, true=minutes
    var interval = minutes ? 60000 : 1000; 
    var IDLE_TIMEOUT = 5; // minutes or seconds
    var idleCounter = 0;

    document.onmousemove = document.onkeypress = function () 
    {idleCounter = 0;};

    window.setInterval(function () 
    {
        if (++idleCounter >= IDLE_TIMEOUT) 
        {window.location.reload();}
    }, interval);
}());