Examine source code of Typewriter Effect

{
  "manifest_version": 3,
  "name": "Typewriter Effect",
  "version": "1.0",
  "description": "Text appears on the screen gradually, simulating a character-by-character typing effect.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "typewriter_effect.png"
  },
  "icons": {
    "128": "typewriter_effect.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "n4williemcfaddenbsoa885@hotmail.com"
    }
  }
}