chromium/chrome/test/data/extensions/permissions/content_script_all_urls.json

{
  "name": "<all_urls> in content script matches list",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "version": "1"
}