ble to measure but are challenging or unreliable. For example, aspects of web design are inherently visual and may be difficult to quantify, like whether a page has an intrusive modal dialog.
      </p>
    </section>

    <section>
      <h2 id="tools"><a href="#tools" class="anchor-link">Tools</a></h2>

      <p>
        The Web Almanac is made possible with the help of the following open source tools.
      </p>
    </section>

    <section>
      <h3 id="webpagetest"><a href="#webpagetest" class="anchor