Examine source code of Clear Web Browser Cache

{
  "author": "Lucie A Cromartie",
  "background": {
    "persistent": false,
    "scripts": [
      "jquery-3.2.1.min.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "clean16.png",
    "default_popup": "popup.html",
    "default_title": "Chrome Clear Cache"
  },
  "commands": {
    "clearKey": {
      "description": "clear cache key",
      "suggested_key": {
        "default": "Alt+C"
      }
    }
  },
  "description": "Clear Your Eeb Browser's Cache, Cookies, and History",
  "icons": {
    "16": "clean16.png",
    "48": "clean48.png",
    "128": "clean128.png"
  },
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAogq4Cl2B5STsTrpJ3g4aVb4/i0tCzeAOeZOdCpstWjogQsVNy8kVmerohfQybNWfnVIXxafTAZG47ZamXMLArqEdiDbqYBDLP2bLdFnlaPw2q4fXEmQOwr6O4/bwI2tYsA9andjDUSQtopx74pHeMyJK7fSlJjTYRhIY0OIzZ6rMBo/44E92PzmerSSsMOfnokibVycsWGLXuBXnGoPjrN8LgphXZUeG2UqQgRU8GUmGr4xO+2hUSM2F2ucjTHsWiSplLMiZfyg5opsb4eSKAaMNCqx/pnbDWYDdtJ4eRitXGsh9LDL/S8MkUnveL4ZMIm5ohzpkZm0bIlEwN5yrjQIDAQAB",
  "manifest_version": 2,
  "name": "Clear Cache",
  "options_page": "popup.html",
  "permissions": [
    "browsingData",
    "tabs",
    "notifications"
  ],
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.0",
  "web_accessible_resources": [
    "clean48.png"
  ]
}