Examine source code of Simple Todo

{
  "manifest_version": 2,
  "name": "Simple Todo",
  "version": "1.13.8",
  "description": "Replace the newtab page with a simple todo list",
  "icons": {
    "48": "build/icons/48x48.png",
    "128": "build/icons/128x128.png"
  },
  "author": "Arnelle Balane",
  "homepage_url": "https://simple-todo.arnelle.dev",
  "chrome_url_overrides": {
    "newtab": "build/index.html"
  },
  "permissions": [
    "topSites",
    "https://simple-todo.arnelle.dev/"
  ],
  "content_security_policy": "default-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self'; img-src 'self' data: blob: https: http:; script-src 'self'; connect-src 'self' https://simple-todo.arnelle.dev https://images.unsplash.com https://o31372.ingest.sentry.io",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0fa0511-194a-467a-adda-9feb6fed1c53}"
    }
  }
}