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

{
  "name": "Content Script API Tests",
  "version": "1",
  "manifest_version": 2,
  "background": {
    "scripts": ["background.js"],
    "persistent": true
  },
  "permissions": [ "*://a.com:*/*", "*://b.com:*/*" ],
  "content_scripts": [
    {
      "matches": ["*://a.com:*/*"],
      "js": ["cookies.js"]
    }
  ]
}