Examine source code of GPTDisguise

{
  "manifest_version": 3,
  "name": "GPTDisguise",
  "version": "1.4.2",
  "description": "Disguise ChatGPT, Claude, and Gemini as Google Docs.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://gptdisguise.vercel.app/*",
    "https://nytlywcvjazwzfkmustp.supabase.co/*",
    "https://chatgpt.com/*",
    "https://chat.openai.com/*",
    "https://claude.ai/*",
    "https://gemini.google.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "richardxzheng@outlook.com",
      "strict_min_version": "115.0"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon.ico"
  },
  "commands": {
    "toggle-disguise": {
      "suggested_key": {
        "default": "Ctrl+Shift+Z",
        "mac": "MacCtrl+Shift+Z"
      },
      "description": "Toggle the disguise on/off (premium)"
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "disguise-config.js",
      "extension-auth-helper.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://gptdisguise.vercel.app/*"
      ],
      "js": [
        "readJWT.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/*"
      ],
      "matches": [
        "https://chatgpt.com/*",
        "https://chat.openai.com/*",
        "https://claude.ai/*",
        "https://gemini.google.com/*"
      ]
    }
  ]
}