I wrote a 
greasemonkey/tampermonkey  userscript that automatically injects all of the included images so that you can see them while you play
This userscript comes with *no warranty or guarantee*, but it is open source so you can read it for yourself and see that it isn't trying to do malicious. It works for me.
It also won't slow down your gameplay since the userscript doesn't run until the page has fully loaded. This decision does have the side effect of maybe flashing the greyscale images for a moment, but the color versions load. It's not that distracting IMO.

 

 
Code: Select all
// ==UserScript==
// @name         Zorg images
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Replaces Zorg Empire CDN images with colorized Imgur versions lazily
// @author       Mark Davis
// @include  /^https://www.zorgempire.net*/
// @grant        none
// ==/UserScript==
(function() {
    'use strict';
    // This fetches all of the <img> tags and stores them in "tags".
var tags = document.getElementsByTagName('img');
// This loops over all of the <img> tags.
for (var i = 0; i < tags.length; i++) {
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/202.gif", '//i.imgur.com/Tv29aZ9.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/203.gif", '//i.imgur.com/uvPssBw.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/204.gif", '//i.imgur.com/Nh4iSgb.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/205.gif", '//i.imgur.com/PInswCd.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/206.gif", '//i.imgur.com/fXKu0tJ.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/207.gif", '//i.imgur.com/oKhe4S0.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/208.gif", '//i.imgur.com/Z6KobJM.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/209.gif", '//i.imgur.com/XGu9JYE.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/210.gif", '//i.imgur.com/7A9wKWk.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/211.gif", '//i.imgur.com/iCnrSn5.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/212.gif", '//i.imgur.com/XwN2U8h.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/213.gif", '//i.imgur.com/CcPbFNC.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/214.gif", '//i.imgur.com/VamD0xW.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/216.gif", '//i.imgur.com/Mm9QZLJ.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/217.gif", '//i.imgur.com/4XK66G3.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/217.gif", '//i.imgur.com/4XK66G3.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/221.gif", '//i.imgur.com/Gr9yWxj.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/502.gif", '//i.imgur.com/v7jLYhr.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/503.gif", '//i.imgur.com/dzWIKMM.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/44.gif", '//i.imgur.com/Faoo74i.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/1.gif", '//i.imgur.com/AlCc7aR.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/2.gif", '//i.imgur.com/LpdQuHd.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/3.gif", '//i.imgur.com/1FAGMOW.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/4.gif", '//i.imgur.com/iLpqUs8.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/12.gif", '//i.imgur.com/xQQGdwP.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/14.gif", '//i.imgur.com/BaT3aTd.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/15.gif", '//i.imgur.com/gfKwLdZ.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/21.gif", '//i.imgur.com/ZXut2i9.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/22.gif", '//i.imgur.com/ScTMUZl.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/23.gif", '//i.imgur.com/Uehi8L6.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/24.gif", '//i.imgur.com/AY9nMvI.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/31.gif", '//i.imgur.com/AbTjRck.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/34.gif", '//i.imgur.com/PxHLWiI.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/41.gif", '//i.imgur.com/PuW6xBu.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/42.gif", '//i.imgur.com/jZHiKIB.gif');
    tags[i].src = tags[i].src.replace("//www.zorgempire.net/cdn/zorg/skins/zorg/gebaeude/43.gif", '//i.imgur.com/GwWiv99.gif');
}
})();