Examine source code of Book Library

{
  "manifest_version": 2,
  "name": "Book Library",
  "version": "1.3",
  "description": "A simple book library utility to manage your book collection.",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icons/logo_32.png",
      "64": "icons/logo_64.png",
      "128": "icons/logo_128.png"
    }
  },
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c798a9e7-0b98-4823-944f-b98ba933ca77}"
    }
  }
}