Examine source code of WPTheme Plugin Detector

{
  "name": "WordPress Theme and Plugin Detector",
  "description": "WordPress Theme Detector can detect installed WordPress Themes and WordPress Plugins on the Website you are currently viewing.",
  "homepage_url": "https://themesinfo.com",
  "version": "2.2",
  "manifest_version": 2,
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "permissions": [
    "scripting",
    "activeTab",
    "tabs"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/icon-none.png"
    },
    "default_popup": "html/popup.html",
    "default_title": "WordPress Theme Detector"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmSKWMUD4ePsbmh4BRE8BKxzQT9yDURF88tZRSS17JqjovCpYYk8vm4EUPHBNtd/faihrAcfhZ7XhmNc632KTROJDyDP/uWfnwR+swfPKD0MsXeQSiV0ZGeEFfT4Edyfv4tTj/IWavxuQGqBFvFUnfCTtzXgxnhCZNIYLvwzlmRdY1/48KoPOEamCb5rURSD/iUApAGUDpcbNgeGlUb0n2UW0p+oG8UFBZY3TbkFMW2vIadoS684raFM9WXZsRHOb0PzLMmEQxotQZjfkRFaBeX0LZ6fPAQIma60czzHr7xxc+o9oeX5bzeXsivWm8ZQhk5KW1fmzNr+gJ27NYAPhzQIDAQAB",
  "browser_specific_settings": {
    "gecko": {
      "id": "{8c78ace9-d79f-4c82-acde-e5bc11e94996}"
    }
  }
}