src/chrome/test/data/extensions/extension1/manifest

{
  "format_version": 1,
  "id": "com.google.myextension1",
  "version": "1.0",
  "name": "My extension 1",
  "description": "The first extension that I made.",
  "content_scripts": [
    "script1.user.js",
    "script2.user.js"
  ]
}