chromium/chrome/test/data/extensions/api_test/i18nUpdate/manifest.json

{
  "name": "i18n Message Test",
  "version": "1.0",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentscript.js"
      ]
    }
  ],
  "default_locale": "en",
  "manifest_version": 3
}