title: Facebook login and share not working in Chrome extension because of app domain
body: <p>I'm new to creating extensions so please bear with me.I'm trying to create an extension that shares the current page URL via Facebook. I followed the instructions Facebook developers site and created a project but i don't know what to put up as the app domain because local host works but chrome-extension://"id" doesn't. </p>
  
  <p>On clicking share button, Error appears"Can't Load URL: The domain of this URL isn't included in the app's domains. To be able to load this URL, add all domains and subdomains of your app to the App Domains field in your app settings."
  What do I put as the app domain and url?</p>