Examine source code of Native Sim

{
  "manifest_version": 2,
  "name": "Native Sim",
  "version": "1.0",
  "description": "View local React Native web build in a mobile phone frame",
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "nativesim@arjayalforte.com",
      "strict_min_version": "120.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_title": "Native Sim",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}