Examine source code of EchoTab

{
  "name": "EchoTab",
  "description": "Echo-Tab is a free extension on Chrome web store, made to spread awareness on everyday activities. EchoTab is 100% privacy safe.",
  "version": "1.1.0",
  "icons": {
    "16": "img/Icon/logo16.png",
    "48": "img/Icon/logo48.png",
    "128": "img/Icon/logo128.png"
  },
  "manifest_version": 2,
  "chrome_url_overrides": {
    "newtab": "./index.html"
  },
  "browser_action": {
    "default_icon": "img/Icon/logo.jpeg"
  }
}