Examine source code of Create a Google Sheet

{
  "manifest_version": 2,
  "name": "Create a Google Sheet",
  "description": "This extension creates a new Google Sheet™",
  "version": "0.0.3",
  "author": "Thomas Hammerlund",
  "icons": {
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "browser_action": {
    "default_icon": "images/icon128.png",
    "default_title": "Create a Google Sheet™"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}