title: Is editing/creating cached browser resources possible?
body: <p>I'm interested in creating a differential updater for some web resources. I currently see 2 ways to do this:</p>
  
  <ol>
  <li>Edit the cached version of my resource</li>
  <li>Create a new browser cached resource from the old cached resource and add the diff pack i request.</li>
  </ol>
  
  <p>Is any scenario possible, and if so, could someone share some resources on this?</p>