Sort all tables, everywhere.

TableSorter.user.js

// ==UserScript==
// @name        TableSorter
// @author      dertuxmalwieder
// @namespace   tuxproject.de
// @description Makes all tables sortable.
// @include     *
// @exclude     /\.(jpe?g|png|gif)$/
// @require     https://raw.githubusercontent.com/White-Tiger/sorttable.js/master/sorttable.js
// @require     https://raw.githubusercontent.com/franciscop/umbrella/master/umbrella.min.js
// @version     1.1
// @license     CDDL-1.0; https://spdx.org/licenses/CDDL-1.0.html#licenseText
// @downloadURL https://gist.githubusercontent.com/dertuxmalwieder/6f3c5fabaa089892d9ddc75c4e4fd9bc/raw/TableSorter.user.js
// @run-at      document-idle
// ==/UserScript==

if (u("table.sortable").first() != null) {
    // Assume there is no other sortable plugin here.
    u("table").each(function() {
        u(this).addClass("sortable");
    });
}

sorttable.init();