Examine source code of TOTP Auth

{
  "manifest_version": 2,
  "name": "SHA-256 TOTP",
  "version": "1.2",
  "description": "Copies the TOTP code to the clipboard when clicked.",
  "permissions": [
    "storage",
    "activeTab",
    "clipboardWrite",
    "notifications",
    "tabs"
  ],
  "icons": {
    "720": "icons/light.png"
  },
  "browser_action": {
    "default_title": "Copy TOTP Code",
    "default_popup": "options.html",
    "default_icon": "icons/light.png",
    "theme_icons": [
      {
        "light": "icons/light.png",
        "dark": "icons/dark.png",
        "size": 720
      }
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a4fbe6a7-860c-4f47-a190-0bc40a911114}"
    }
  }
}