Examine source code of Iconosquare Extension

{
  "name": "Iconosquare Extension",
  "short_name": "Iconosquare",
  "author": "Iconosquare",
  "version": "1.5",
  "manifest_version": 2,
  "description": "Access all your Instagram activity and analytics in your browser!",
  "browser_action": {
    "default_icon": "img/logo_grey.png",
    "default_title": "Instagram Manager by Iconosquare",
    "default_popup": "disable.html"
  },
  "icons": {
    "16": "img/favicon-16.png",
    "48": "img/favicon-57.png",
    "128": "img/favicon-152.png"
  }
}