Examine source code of Google Meet Push to Talk

{
  "manifest_version": 2,
  "name": "Google Meet Push to Talk",
  "description": "Enable push to talk functionality in Google Meet",
  "version": "1.0.6",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png",
    "512": "icons/icon-512.png",
    "1024": "icons/icon-1024.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://meet.google.com/*"
      ],
      "js": [
        "js/content_script.js"
      ],
      "css": [
        "css/ptt.css"
      ]
    }
  ]
}