title: How do I get the absolute path of the chrome extensions directory?
body: <p>I'm writing an app that has full access to the file system and I want to be able to get the absolute path of my extension's directory. How would I do this? </p>
  
  <p>My app has permissions to <code>"&lt;all_urls&gt;", {"filesystem": [ "write" ]}</code> and has the "allow access to file urls" checked.</p>