Examine source code of Gladiatus Forge Master

{
  "manifest_version": 3,
  "name": "Gladiatus Forge Master",
  "description": "Gladiatus Forge Master is a browser extension that helps you with forging and smelting in Gladiatus.",
  "version": "0.4.1",
  "author": "Kacper Rogula",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "gladiatus-forge@kx1000.cyou",
      "strict_min_version": "58.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.gladiatus.gameforge.com/game/index.php*"
      ],
      "js": [
        "vendor/nice-select2.min.js",
        "vendor/popper.js",
        "vendor/tippy.js",
        "html-components.js",
        "searchbar.js",
        "components.js",
        "horrerum.js",
        "calculator.js"
      ],
      "css": [
        "vendor/nice-select2.min.css",
        "style.css"
      ]
    }
  ],
  "host_permissions": [
    "https://gladiatus-compare.kx1000.cyou/*"
  ]
}