Examine source code of World Capitals Quiz

{
  "manifest_version": 2,
  "name": "World Capitals Quiz",
  "version": "1.0",
  "description": "Test your knowledge of world capitals with this quick and fun Firefox quiz extension.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "World Capitals Quiz"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a45743e3-1a8c-47e2-83c5-33b169f0c619}"
    }
  }
}