XMLHttpRequest error: Origin not allowed by Access-Control-Allow-Origin
<p>Basically I want to create an AddOn for Firefox which will fetch only RSS feeds from particular website. But I am getting an error:</p>

<blockquote>
  <p>XMLHttpRequest cannot load <a href="http://www.-" rel="nofollow">http://www.-</a>** Origin
  <code>http://localhost:59382</code> is not allowed by Access-Control-Allow-Origin.</p>
</blockquote>

<p>Can anyone explain how to resolve this error?</p>
