Examine source code of Tech Tracker

{
  "manifest_version": 2,
  "name": "WhatRuns",
  "description": "Discover what runs a website. Frameworks, Analytics Tools, Wordpress Plugins, Fonts - you name it.",
  "homepage_url": "https://www.whatruns.com/?source=plugin",
  "default_locale": "en",
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "images/icon_16.png",
      "32": "images/icon_32.png"
    },
    "default_popup": "popup.html",
    "default_title": "WhatRuns - click for more details"
  },
  "content_scripts": [
    {
      "js": [
        "js/browser-polyfill.js",
        "js/content.js",
        "js/notification.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "icons": {
    "16": "images/icon_16.png",
    "32": "images/icon_32.png",
    "120": "images/icon_120.png"
  },
  "permissions": [
    "tabs",
    "webRequest",
    "webNavigation",
    "storage",
    "cookies",
    "http://*/*",
    "https://*/*"
  ],
  "version": "1.7.4",
  "web_accessible_resources": [
    "js/wrs_env.js",
    "images/*",
    "css/notification.css"
  ]
}