<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500">
  <title>Tab Manager v2</title>
</head>
<body>
  <div id="app-container">
    <div id="spinner">
      <div class="la-ball-spin la-dark la-3x">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
      </div>
    </div>
  </div>
  <div id="popup"></div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700&display=swap" />
  <meta name="viewport" content="minimum-scale=1, initial-scale=1, width=device-width" />
  <title>Tab Manager v2</title>
</head>
<body>
  <div id="app-container">
    <div id="spinner">
      <div class="la-ball-spin la-dark la-3x">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
      </div>
    </div>
  </div>
  <div id="popup"></div>
</body>
</html>

Update Material UI fonts import, add viewport
Update Material UI fonts import, add viewport
