Examine source code of Amazon CODES and cities

{
  "manifest_version": 2,
  "name": "Amazon Location Add-on",
  "version": "1.0",
  "description": "Display Amazon Fulfillment Center location based on code",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Amazon Location"
  },
  "applications": {
    "gecko": {
      "id": "amazon-location-addon@example.com",
      "strict_min_version": "42.0"
    }
  }
}