var betaLogoData = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACEAAAANCAYAAAAnigciAAAAAXNSR0IArs4c6QAAAahJREFUOMvFkbFL42AYhx%2FTBKQYHRRa2sXTpSJ3o0ImMZi10U1QyegfoEehsxBI516d%2FMBZyFyxYwedFKRZqi4FCzpco0EoVAdJD2lT7A3tb%2Fx43%2Fd7eH4Tx%2FBeU1Xuk0kCRWGUmQsC1h4ekEKAdizGqBMoCjVVRR6HgTDtWIzm7CxyFEAinebg6AiAZqNBybZ58X0M02TDNLtzJdtmP5fr2T%2B0LAAcISjZNnXP64WQJP5OTiJHUSZTqe6xrb099nM5Cvk8iVSKm8tLTovFng%2FLt7cYy8vdd03XeW212Mhm%2B0KEINJ31TUbjaF1G9ksp8UiP1dXB84NhFjIZHCEYHNnh2ql8u%2B4aeIIgSNE5O6UqrKYyVD3PO5rNTRdj5yVB0HceR6HlkUinaZwcsKuYXxqd90vdfSLpuvEp6dxhOhWW724GB4izGurNXQV2vo6vy2Luucxpar8OTv7PxNhHQCFfP5LHb9WVgA4d13KrhtZBcCL73N9dYWm631tTGzPz78%2FxeOMK%2FF2Gynx%2FMxcEIwFQOl0%2BPH4iLzk%2BwCM2obS6TDz9saS7%2FMBIPuaPAeD2rAAAAAASUVORK5CYII%3D"; var betaLogo = document.createElement("img"); betaLogo.setAttribute("src", betaLogoData);
An updated version for the new Kongregate skin:
// ==UserScript==
// @name Kongregate Beta!
// @description Returns the "beta"-tag.
// @match http://www.kongregate.com/*
// @match https://www.kongregate.com/*
// @version 0.0.2
// @namespace https://gf.qytechs.cn/users/32649
// @downloadURL https://update.gf.qytechs.cn/scripts/17754/Kongregate%20Beta%21.user.js
// @updateURL https://update.gf.qytechs.cn/scripts/17754/Kongregate%20Beta%21.meta.js
// ==/UserScript==
var betaLogoData = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACEAAAANCAYAAAAnigciAAAAAXNSR0IArs4c6QAAAahJREFUOMvFkbFL42AYhx%2FTBKQYHRRa2sXTpSJ3o0ImMZi10U1QyegfoEehsxBI516d%2FMBZyFyxYwedFKRZqi4FCzpco0EoVAdJD2lT7A3tb%2Fx43%2Fd7eH4Tx%2FBeU1Xuk0kCRWGUmQsC1h4ekEKAdizGqBMoCjVVRR6HgTDtWIzm7CxyFEAinebg6AiAZqNBybZ58X0M02TDNLtzJdtmP5fr2T%2B0LAAcISjZNnXP64WQJP5OTiJHUSZTqe6xrb099nM5Cvk8iVSKm8tLTovFng%2FLt7cYy8vdd03XeW212Mhm%2B0KEINJ31TUbjaF1G9ksp8UiP1dXB84NhFjIZHCEYHNnh2ql8u%2B4aeIIgSNE5O6UqrKYyVD3PO5rNTRdj5yVB0HceR6HlkUinaZwcsKuYXxqd90vdfSLpuvEp6dxhOhWW724GB4izGurNXQV2vo6vy2Luucxpar8OTv7PxNhHQCFfP5LHb9WVgA4d13KrhtZBcCL73N9dYWm631tTGzPz78%2FxeOMK%2FF2Gynx%2FMxcEIwFQOl0%2BPH4iLzk%2BwCM2obS6TDz9saS7%2FMBIPuaPAeD2rAAAAAASUVORK5CYII%3D";
var betaLogo = document.createElement("img");
betaLogo.setAttribute("src", betaLogoData);
betaLogo.style.position="relative";
betaLogo.style.left="10px";
betaLogo.style.top="6px";
var kongregateHeader = document.querySelector("#navbar_desktop > div")
kongregateHeader.appendChild(betaLogo);