Examine source code of Switchalot

{
  "manifest_version": 3,
  "name": "Switchalot",
  "version": "1.0.3",
  "description": "Easily switch between various environments/domains of your website",
  "permissions": [
    "activeTab"
  ],
  "action": {
    "default_popup": "index.html"
  },
  "icons": {
    "16": "favicon-16.png",
    "32": "favicon-32.png",
    "48": "favicon-48.png",
    "128": "favicon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "switchalot@neighbourhoodkoala.com",
      "data_collection_permissions": {
        "required": [
          "websiteActivity"
        ]
      }
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}