chrome/common/extensions/docs/examples/api/contextMenus/event_page/manifest.json

{
  "name": "Context Menus Sample (with Event Page)",
  "description": "Shows some of the features of the Context Menus API using an event page",
  "version": "0.7",
  "permissions": ["contextMenus"],
  "background": {
    "persistent": false,
    "scripts": ["sample.js"]
  },
  "manifest_version": 2
}