Examine source code of Random Friendship Quote

{
  "manifest_version": 2,
  "name": "Random Friendship Quote",
  "version": "1.0",
  "description": "Displays a random friendship quote every time you click the extension button.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png",
      "96": "icon96.png"
    }
  },
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1981f9b7-6113-4ce9-9bf9-9b7682f39968}"
    }
  }
}