Examine source code of Memory match game

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "64.png"
  },
  "description": "Memory match  game for firefox",
  "icons": {
    "16": "64.png",
    "48": "64.png",
    "128": "128.png"
  },
  "web_accessible_resources": [
    "style.css"
  ],
  "manifest_version": 2,
  "name": "Memory match game",
  "options_ui": {
    "page": "option.html"
  },
  "version": "1.0.0"
}