Examine source code of State Shuttle

{
  "manifest_version": 3,
  "name": "State Shuttle",
  "short_name": "State Shuttle",
  "version": "1.0.0",
  "description": "Export and import localStorage, sessionStorage, cookies, IndexedDB, and Cache Storage as JSON.",
  "action": {
    "default_popup": "popup.html",
    "default_title": "State Shuttle",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "scripting",
    "cookies",
    "downloads",
    "storage"
  ],
  "optional_host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "host_permissions": [],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "state-shuttle@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}