A cursory inspection of the html shows nothing in the header and nothing blocked on the usual uBlock Origin / Firefox tracking protection dashboards.

Edit - the header in its entirety:

    <head>
      <title>Text-Only NPR.org</title>
      <meta name="robots" content="noindex, nofollow">
      <meta name="viewport" content="width=device-width, initial-scale=1">
    </head>