Just do it!

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Just do it!",
  "description": "Get motivated",
  "version": "1.0",
  "browser_action": {
    "default_icon": "logo.png",
    "default_title": "Just Do it"
  },
  "background": {
    "scripts": [
      "audio.js"
    ],
    "persistent": false
  }
}