Examine source code of ANWhatsApp Features

{
  "manifest_version": 2,
  "name": "ANWhatsApp Features",
  "version": "0.1",
  "description": "Displays a random feature of ANWhatsApp",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png"
    }
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{078c09c2-2efb-4617-a7ab-30411f484054}"
    }
  }
}