<!DOCTYPE html>
<html lang="" style="width: 100%; height: 100%; margin: 0; padding: 0">
<head>
<title>devtools</title>
<script defer src="devtools.js"></script>
</head>
<body style="width: 100%; height: 100%; margin: 0; padding: 0; overflow: hidden">
devtools
<button id="send2bg">send to background</button>
<div id="text"></div>
</body>
</html>