Examine source code of Cute Cat

{
  "manifest_version": 2,
  "description": "Bring a cute cat into every new tab — chat, meow, purr, and enjoy cozy music together!",
  "name": "Cute Cat",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "img/icon128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "icons": {
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "version": "1.0.6",
  "browser_specific_settings": {
    "gecko": {
      "id": "cutecat@cute-cat",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "storage"
  ]
}