<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="google" value="notranslate">
<title>Extension Script For Whistle</title>
</head>
<body>
<div id="main" class="main"></div>
<script src="/index.js"></script>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="google" value="notranslate">
<title>Extension Script For Whistle</title>
</head>
<body>
<div id="main" class="main"></div>
<script src="index.js"></script>
</body>
</html>

Use relative url instead of
refactor: Use relative url instead of
