Examine source code of Ultra Strong Passwords

{
  "manifest_version": 3,
  "version": "2.0.1",
  "name": "Ultra Strong Passwords",
  "description": "Generate ultra strong passwords for your data's safety.",
  "permissions": [],
  "host_permissions": [],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "./public/16-ultra-secure-passwords-icon-circle.png",
      "32": "./public/32-ultra-secure-passwords-icon-circle.png",
      "128": "./public/128-ultra-secure-passwords-icon-circle.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@ultra-strong-passwords"
    },
    "firefox": {
      "id": "@ultra-strong-passwords"
    },
    "chrome": {
      "id": "@ultra-strong-passwords"
    }
  }
}