title: What is the extension of a cookie?
body: <p>This might sound like a simple question but I find it impossible to google it, because I get only results for various extensions to various programs that have something to do with cookies.</p>
  <p>I came across this example code:</p>
  <pre><code>local ok, err = cookie:set({
      key = &quot;Name&quot;, value = &quot;Bob&quot;, path = &quot;/&quot;,
      domain = &quot;example.com&quot;, secure = true, httponly = true,
      expires = &quot;Wed, 09 Jun 2021 10:18:14 GMT&quot;, max_age = 50,
      samesite = &quot;Strict&quot;, extension = &quot;a4334aebaec&quot;
  })
  </code></pre>
  <p>What does extension mean here?</p>