title: File Monitoring and Upload via Google Chrome Extension
body: <p>I am trying to build a Google Chrome Extension which does the following - </p>
  
  <p>1) Gets activated when someone visits my site say <a href="http://example.com" rel="nofollow">http://example.com</a>
  2) When someone downloads a file from my site , <a href="http://example.com" rel="nofollow">http://example.com</a>, it starts monitoring that file for changes. 
  3) If the user edits and saves that file, it uploads the modified file back to the system.</p>
  
  <p>My site is a niche document management system for a particular industry. Users dont want to downloads files, edit and then re-upload again. They want the files to be uploaded as soon as they save on their side. Its mostly for .docx, .xlsx files. </p>
  
  <p>I tried to look at the Google chrome apis, but couldnt locate the appropriate ones. Any help would be useful. </p>
  
  <p>Thanks!</p>