HTML панели
<!DOCTYPE html>\n<html lang="en">\n<head>\n\t<meta charset="UTF-8">\n\t<title></title>\n\t<style>\n\t\t* {\n\t\t\tpadding: 0;\n\t\t\tbox-sizing: border-box;\n\t\t\tfont-size: 14px;\n\t\t}\n\t\tbody {\n\t\t\tpadding: 40px 0 0 0;\n\t\t\tmargin: 0;\n\t\t}\n\t\tbody > div:not(:last-of-type) {\n\t\t\tpadding-bottom: 10px;\n\t\t\tborder-bottom: 1px solid #555;\n\t\t}\n\t\tbody > div > div {\n\t\t\tpadding: 5px 10px;\n\t\t\tbackground: #eee;\n\t\t\tmargin-bottom: 10px;\n\t\t}\n\t\tbody > div > div > label {\n\t\t\tpadding-left: 20px;\n\t\t\tposition: relative;\n\t\t\tmargin-left: 5px;\n\t\t}\n\t\tbody > div > div > label > input {\n\t\t\tposition: absolute;\n\t\t\tleft: 5px;\n\t\t\tbottom: 1px;\n\t\t\tmargin: 0;\n\t\t}\n\t\tbutton {\n\t\t\tpadding: 0 3px;\n\t\t}\n\t\tul {\n\t\t\tlist-style: none;\n\t\t\tpadding: 0;\n\t\t\tmargin: 0 5px;\n\t\t}\n\t\tol {\n\t\t\tlist-style-position: inside;\n\t\t\tpadding: 0;\n\t\t\tmargin: 0 5px;\n\t\t}\n\t\tol ::marker {\n\t\t\tfont-weight: bold;\n\t\t}\n\t\tol li:not([id]) {\n\t\t\tcolor: #ccc;\n\t\t}\n\t\tli {\n\t\t\tpadding: 3px 0;\n\t\t\tposition: relative;\n\t\t}\n\t\tli > input[type="checkbox"] {\n\t\t\tposition: absolute;\n\t\t\tmargin-top: 4px;\n\t\t}\n\t\tli > input[type="text"] {\n\t\t\twidth: 100%;\n\t\t\tpadding-left: 20px;\n\t\t}\n\t\tli > button {\n\t\t\tposition: absolute;\n\t\t\tright: 0;\n\t\t}\n\t\t#head {\n\t\t\tposition: fixed;\n\t\t\tleft: 0;\n\t\t\tright: 0;\n\t\t\ttop: 0;\n\t\t\tpadding: 10px 10px;\n\t\t\tbackground: #fff;\n\t\t\tz-index: 1;\n\t\t}\n\t\t#reset {\n\t\t\tfloat: right;\n\t\t}\n\t\t#contains {\n\t\t}\n\t\t#scripts {\n\t\t\tmax-height: 300px;\n\t\t\toverflow: auto;\n\t\t}\n\t</style>\n</head>\n<body>\n<div id="head">\n\t<button id="attach">attach</button>\n\t<button id="trace" disabled>trace</button>\n\t<span id="steps">0</span>\n\t<button id="reset">reset</button>\n</div>\n<div id="scripts"></div>\n<div id="contains"></div>\n<div id="result"></div>\n\n<script src="tracing.js"></script>\n</body>\n</html>Полное описание расширения Chrome Debugger Tracing