chromium/chrome/test/data/extensions/back_forward_cache/content_script_message_on_pagehide/manifest.json

{
  "name": "extension send message on page hide",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Test sending message from extensions.",
  "content_scripts": [
    {
      "matches": ["http://*/*", "https://*/*"],
      "js": ["content_script.js"],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": ["background.js"],
    "persistent": false
  }
}