Examine source code of Smart Cookie AutoDelete

{
  "manifest_version": 2,
  "name": "Smart Cookie AutoDelete",
  "version": "1.0",
  "description": "Automatically deletes cookies when tabs are closed.",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "permissions": [
    "cookies",
    "tabs",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "smart-cookie-autodelete-8392@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}