Examine source code of Final Fight Arcade Game

{
  "icons": {
    "128": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Final Fight Arcade Game Play No Download"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "description": "Final Fight Play No Download Arcade Game on Your Firefox Window",
  "name": "Final Fight Arcade Game",
  "manifest_version": 2,
  "permissions": [
    "activeTab"
  ],
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.0.0"
}