title: cookie or localStorage with chrome extensions
body: <p>I've read all the other q's here regarding the topic but couldn't solve my problem.<br>
  I'm setting on my website the email of the user in the localStorage and i want to retrieve it in the extension.</p>
  
  <pre><code>localStorage.setItem("user", "andrei.br92@gmail.com" ); 
  </code></pre>
  
  <p>But when i try to receive it with the chrome extension it fails to do so  </p>
  
  <pre><code>value = localStorage.getItem("user");
  </code></pre>
  
  <p>Which way is easier ? cookies localstorage ? im not pretentious</p>