Examine source code of Google Meet Microphone Toggle

{
  "manifest_version": 3,
  "name": "Google Meet Microphone Toggle",
  "version": "1.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{065116b0-3748-4d61-b4da-718235a3e1f1}",
      "strict_min_version": "109.0"
    }
  },
  "description": "Adds browser-wide shortcuts to toggle microphone and camera in Google Meet",
  "commands": {
    "ToggleMicrophone": {
      "description": "Toggle microphone",
      "suggested_key": {
        "default": "Ctrl+Alt+D"
      }
    },
    "ToggleCamera": {
      "description": "Toggle camera",
      "suggested_key": {
        "default": "Ctrl+Alt+E"
      }
    }
  },
  "icons": {
    "48": "icons/on-48.png",
    "96": "icons/on-96.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/disabled-16.png",
      "32": "icons/disabled-32.png",
      "48": "icons/disabled-48.png",
      "96": "icons/disabled-96.png"
    },
    "default_title": "Google Meet Microphone Toggle",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://meet.google.com/*"
      ],
      "js": [
        "meet.js"
      ],
      "run_at": "document_end"
    }
  ]
}