// create a bookmark and use this code as the URL, you can now toggle the css on/off // thanks+credit: https://dev.to/gajus/my-favorite-css-hack-32g3 javascript: (function() { var styleEl = document.getElementById('css-layout-hack'); if (styleEl) { styleEl.remove(); return; } styleEl = document.createElement('style'); styleEl.id = 'css-layout-hack'; styleEl.innerHTML = '* { background:#000!important;color:#0f0!important;outline:solid #f00 1px!important; background-color: rgba(255,0,0,.2) !important; }\ * * { background-color: rgba(0,255,0,.2) !important; }\ * * * { background-color: rgba(0,0,255,.2) !important; }\ * * * * { background-color: rgba(255,0,255,.2) !important; }\ * * * * * { background-color: rgba(0,255,255,.2) !important; }\ * * * * * * { background-color: rgba(255,255,0,.2) !important; }\ * * * * * * * { background-color: rgba(255,0,0,.2) !important; }\ * * * * * * * * { background-color: rgba(0,255,0,.2) !important; }\ * * * * * * * * * { background-color: rgba(0,0,255,.2) !important; }'; document.body.append(styleEl); })();