Examine source code of Web Audio Inspector

{
  "author": "Google Web Audio API Tools",
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "js/tab-page-changed.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    },
    {
      "all_frames": true,
      "js": [
        "js/inject-tracing.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "View web audio graphs. Inspect AudioNodes.",
  "devtools_page": "dev-tools.html",
  "icons": {
    "48": "media/images/icon.png",
    "128": "media/images/icon.png"
  },
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqGdjJLx1Z6mqinJ4ErGdmRKVXQpGBNa7zlIWxHBJrYQv4b8znXAj8hFMpqJXlf9qKVIUacrhubNV84C3p30b2HgQEBMm31WzZnrnxz+iMweeyxPfDqpxHUbN2drtuR6hGEg5Qjj5hlGu2AoPjOJMz9aJlh54CIZ8vgBmYS+fuAex1aD+mW7JcxpUHrs+e8+CFCUJxO62bx1mIpG4FE2LRkAnOTPE3b8UDjuaUulY5krA7Ldr3Pmxqy0Dyb7EoQ9VLD0uVEkRXX/8u2OA2sBm00XwxJB4wb4sSW3B53hXYkodjX0j2p9Viss+CS3Ja04LhEM2MM2j8gXJJxDkgTRjAwIDAQAB",
  "manifest_version": 2,
  "name": "Web Audio Inspector",
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "0.1.4",
  "web_accessible_resources": [
    "images/*",
    "js/*"
  ]
}