src/html/background.html
<!DOCTYPE html>
<html>
<head>
<title>Background page</title>
<meta charset="UTF-8">
<script src="../vendors/requirejs/require.js"></script>
<script src="../js/backend/loader.js"></script>
<script src="../js/backend/main.js"></script>
</head>
<body>
</body>
</html>