Examine source code of TranscripTonic

{
  "manifest_version": 2,
  "name": "TranscripTonic",
  "version": "3.1.2",
  "description": "Simple Google Meet transcripts. Private and open source.",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "128": "icon.png"
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "matches": [
        "https://meet.google.com/*"
      ],
      "exclude_matches": [
        "https://meet.google.com/"
      ]
    }
  ],
  "permissions": [
    "storage",
    "downloads",
    "https://meet.google.com/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "icon.png",
    "popup.html",
    "content.js",
    "background.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9c610022-e8ef-405a-8309-748e30503b7d}"
    }
  }
}