Examine source code of State URL Shortener

{
  "manifest_version": 3,
  "name": "State.sk URL Shortener",
  "version": "1.0.0",
  "description": "Shorten URLs quickly with state.sk",
  "browser_specific_settings": {
    "gecko": {
      "id": "url-shortener@state.sk",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab"
  ],
  "host_permissions": [
    "https://state.sk/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}