Sportball

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Sportball",
  "description": "Sport harder than the other team to win!",
  "version": "0.3",
  "offline_enabled": true,
  "app": {
    "background": {
      "scripts": [
        "background.js"
      ]
    }
  },
  "icons": {
    "128": "icon.png"
  }
}