chromium/chrome/test/data/extensions/api_test/content_scripts/speculation_rules/manifest.json

{
  "name": "content_script speculation rules",
  "version": "1.0",
  "manifest_version": 3,
  "description": "Tests content script can inject inline speculation rules",
  "background": {
    "service_worker": "test.js"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_end"
    }
  ]
}