title: How to abort HTTP request in Firefox Addon SDK
body: <p>The <code>Request</code> object in Firefox Addon SDK doesn't seem to offer an <code>abort</code> function:
  <a href="https://addons.mozilla.org/en-US/developers/docs/sdk/1.1/packages/addon-kit/docs/request.html" rel="nofollow">https://addons.mozilla.org/en-US/developers/docs/sdk/1.1/packages/addon-kit/docs/request.html</a></p>
  
  <p>Did I miss a way to abort HTTP requests or do I have to modify 
  <code>packages\addon-kit\lib\request.js</code></p>