Examine source code of AudioContext Scrambler

{
  "browser_specific_settings": {
    "gecko": {
      "id": "{1af7e84d-e5d3-45fd-b526-b46fe737647d}"
    }
  },
  "manifest_version": 2,
  "name": "AudioContext Scrambler",
  "version": "1.3",
  "description": "Scramble channel data to avoid AudioContext fingerprinting",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-48@2x.png",
    "512": "icons/icon-512.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_popup": "options.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-48@2x.png",
      "512": "icons/icon-512.png"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage",
    "notifications",
    "*://*/*",
    "webRequest"
  ]
}