Examine source code of heStudio Authenticator

{
  "manifest_version": 3,
  "name": "heStudio Authenticator",
  "description": "A TOTP Application.",
  "version": "2.0.2",
  "icons": {
    "16": "assets/logo/16.png",
    "32": "assets/logo/32.png",
    "48": "assets/logo/48.png",
    "128": "assets/logo/128.png"
  },
  "action": {
    "default_popup": "index.html",
    "default_icon": "assets/logo/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "authenticator@hestudio.net",
      "strict_min_version": "109.0"
    }
  }
}