Examine source code of Meet Recorder

{
  "name": "Meet Recorder",
  "description": "Record Google Meet tab audio/video locally, with microphone mixed only while Meet mic is unmuted.",
  "version": "1.1",
  "manifest_version": 3,
  "permissions": [
    "activeTab",
    "tabs",
    "tabCapture",
    "offscreen",
    "downloads",
    "storage"
  ],
  "host_permissions": [
    "https://meet.google.com/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://meet.google.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "turbo@meetrecorder",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}