title: HTML Form does not submit with forward slash
body: <p>I was developing a simple HTML form and I couldn't figure out why the following code works on Chrome but not in Firefox.</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;body&gt;
  
  &lt;form action="/hello.html" method="get"&gt;
    &lt;input type="submit" value="Submit"&gt;
  &lt;/form&gt;
  
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>After a while I figured out that the issue is the slash in the action url.
  When the form action starts with a forward slash ('/'), the form is not submitted in firefox.
  Without '/' from the action tag, pressing the 'submit' button results in a redirect to the <code>hello.html</code> page.</p>
  
  <p>For me this behaviour is weird. I think it is valid to start a (relative) URL in the action attribute of a form tag with a forward slash.
  Do you have some explanation for this behaviour?</p>