title: Getting unique ClientID from chrome extension?
body: <p>I'm developing chrome extension. I need the ability to identify each client as a unique client.</p>
  
  <p>I can't store guid in a cookie  since cookie can be deleted. I need something to be read from the system itself which is unique.</p>
  
  <p>Now - I know that JS doesn't has access to client resources ( local resources) but - and here is my question : </p>
  
  <p><strong>Question</strong></p>
  
  <p>Does chrome extensions Js's provide API for getting unique client information ( I dont care what data - as long as it is unique).</p>
  
  <p>Edit : </p>
  
  <p>Just to clarify : </p>
  
  <p>The user will be shown a unique key ( which is a hash data of his computer). this code will be sent to me , and I will provide matching result which the user will be sent (via email) and only then  - he will be able to use the extension.</p>
  
  <p><em>(no , not all countries support extension payment via wallet , im at one of those countries)</em></p>