Examine source code of Quiz-for-Bookmark

{
  "manifest_version": 2,
  "name": "Quiz-for-Bookmark",
  "description": "Ask a quick quiz before saving a bookmark. Answer correctly to allow saving.",
  "version": "1.0",
  "permissions": [
    "bookmarks",
    "storage",
    "activeTab",
    "contextMenus"
  ],
  "browser_action": {
    "default_title": "Quiz-for-Bookmark",
    "default_popup": "popup.html",
    "default_icon": "icons/icon-48.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "quizbookmark-8611f56c@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}