Examine source code of Flying Dot Game

{
  "manifest_version": 2,
  "name": "Flying Dot Game",
  "version": "1.0",
  "description": "Play the Flying dot game",
  "browser_action": {
    "default_title": "Flying Dot Game"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs"
  ],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{96a2263e-4d2f-4fda-9a3f-ca9b3bf66a68}"
    }
  }
}