Examine source code of Ronald Jack Setup Guide

{
  "manifest_version": 2,
  "name": "Ronald Jack Setup Guide",
  "version": "1.0",
  "description": "Simple guide to install Ronald Jack time attendance devices.",
  "browser_action": {
    "default_popup": "popup.html"
  },
  "applications": {
    "gecko": {
      "id": "ronald_jack_setup@digitaltech.com.vn"
    }
  }
}