chromium/chrome/test/data/extensions/api_test/tabs/connect/manifest.json

{
  "name": "chrome.tabs",
  "version": "0.1",
  "manifest_version": 2,
  "description": "end-to-end browser test for chrome.tab.connect API",
  "background": {
    "persistent": true,
    "scripts": ["test.js"]
  },
  "content_scripts": [
    {
      "matches": ["http://*/*"],
      "js": ["echo.js"]
    }
  ],
  "permissions": ["tabs"]
}