YOU STILL NEED AN ADBLOCKER!
// ==UserScript==
// @name Pixlr Remove Ad Sidebar
// @namespace Pixlr Remove Ad Sidebar
// @description YOU STILL NEED AN ADBLOCKER!
// @author Dragonterror
// @license MIT
// @version 1.0
// @include http://pixlr.com/*
// @include https://pixlr.com/*
// ==/UserScript==
GM_addStyle ( "body {right: 0px;}" );