Examine source code of Codex Usage Viewer

{
  "manifest_version": 3,
  "name": "Codex Usage Viewer",
  "description": "Shows your Codex usage from ChatGPT.",
  "version": "0.1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "codex-usage-viewer@selfhosted",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personallyIdentifyingInfo"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Codex Usage"
  },
  "host_permissions": [
    "https://chatgpt.com/*"
  ],
  "permissions": [
    "storage"
  ]
}