to change SO badges
// ==UserScript==
// @name (SO) Custom badges
// @match *://*.stackoverflow.com/*
// @grant GM_addStyle
// @description to change SO badges
// @version 0.0.1.20180427163640
// @namespace https://greatest.deepsurf.us/users/182332
// ==/UserScript==
GM_addStyle("\
span.badge1 { background: url(http://i.stack.imgur.com/u9W65.png); width: 12px; }\
span.badge2 { background: url(http://i.stack.imgur.com/mKLZu.png); width: 12px; }\
span.badge3 { background: url(http://i.stack.imgur.com/1zG5X.png); width: 12px; }\
.topbar span.badge1 { width: 9px; }\
.topbar span.badge2 { width: 9px; }\
.topbar span.badge3 { width: 9px; }\
");