Audio accelerator for whatsapp

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Audio accelerator for whatsapp",
  "description": "A simple audio accelerator for whatsapp web",
  "version": "0.1",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_end"
    }
  ]
}