Examine source code of Snappy Tab

{
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png"
    },
    "default_title": "__MSG_appName__"
  },
  "chrome_url_overrides": {
    "newtab": "newTab.html"
  },
  "default_locale": "en",
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "permissions": [
    "storage"
  ],
  "version": "1.6.1"
}