chromium/chrome/test/data/extensions/api_test/service_worker/messaging/send_message_worker_to_tab/manifest.json

{
  "name": "SW based extension: Messaging_WorkerToTab test",
  "version": "0.1",
  "manifest_version": 2,
  "description": "chrome.tabs.sendMessage from extension SW.",
  "permissions": ["tabs"],
  "content_scripts": [{
    "matches": ["*://127.0.0.1:*/*"],
    "run_at": "document_start",
    "js": ["content_script.js"]
  }],
  "background": {"service_worker": "service_worker_background.js"}
}