title: Getting "net::ERR_BLOCKED_BY_CLIENT" error on some AJAX calls
body: <p>Recently I've realised that, some adblocker extensions (such as adBlocker plus) block some Ajax calls. I get that error on the console:</p>
  
  <pre><code>GET http://localhost/prj/conn.php?q=users/list/ net::ERR_BLOCKED_BY_CLIENT 
  </code></pre>
  
  <p>Why does it block some Ajax call but not the others and what causes that? Is there any workaround other than telling user to turn off adblocker?</p>