Examine source code of PropFlow

{
  "manifest_version": 2,
  "name": "Aus Property Yield",
  "version": "1.0",
  "description": "Property Yield and Cash Flow Calculator",
  "icons": {
    "48": "icon.svg"
  },
  "browser_action": {
    "default_icon": "icon.svg",
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "auspropertyyield@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}