coding-youtuber/index.html

## index.html
<!DOCTYPE html>
<html>

<style>
  * {
    margin: 0;
    padding: 0;
  }

  body {
    background: #000;
  }

  .viewer {
    display: flex;
    justify-content: center;
    align-items: center;

    width: 100vw;
    height: 100vh;
  }
</style>

<head>
  <meta charset="UTF-8">
  <title>Namedaruma</title>
</head>

<body>
  <div class="viewer">
    <img src="img1.png">
  </div>

</body>

</html>

## manifest.json
{
  "name": "Namedaruma",
  "description": "show namedaruma image",
  "version": "1.0",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "manifest_version": 3
}
	<!DOCTYPE html>
	<html>

	<style>
	* {
	margin: 0;
	padding: 0;
	}

	body {
	background: #000;
	}

	.viewer {
	display: flex;
	justify-content: center;
	align-items: center;

	width: 100vw;
	height: 100vh;
	}
	</style>

	<head>
	<meta charset="UTF-8">
	<title>Namedaruma</title>
	</head>

	<body>
	<div class="viewer">
	<img src="img1.png">
	</div>

	</body>

	</html>
	{
	"name": "Namedaruma",
	"description": "show namedaruma image",
	"version": "1.0",
	"chrome_url_overrides": {
	"newtab": "index.html"
	},
	"manifest_version": 3
	}