Examine source code of My Weather

{
  "name": "My Weather",
  "version": "1.4",
  "description": "5-Day Weather Forecast Of Your City",
  "icons": {
    "128": "images/weather128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "images/My-Weather-Square.jpg"
  },
  "manifest_version": 2
}