Examine source code of KP Plus

{
  "name": "KP Plus",
  "description": "Dodatne opcije za KP sajt: Brzi pregled oglasa, Noćni režim, Uveličaj sliku na klik, Plutajuća traka sa informacijama, Proširi sajt.",
  "version": "2.1.2",
  "author": "Stefan Marjanov",
  "browser_specific_settings": {
    "gecko": {
      "id": "kpp@sn.rs",
      "strict_min_version": "109.0"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false,
    "browser_style": false
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://www.kupujemprodajem.com/*"
  ],
  "content_scripts": [
    {
      "js": [
        "jquery.min.js",
        "content.js",
        "splide/splide.min.js"
      ],
      "matches": [
        "https://www.kupujemprodajem.com/*"
      ],
      "run_at": "document_start"
    },
    {
      "css": [
        "style.css",
        "splide/splide.min.css"
      ],
      "matches": [
        "https://www.kupujemprodajem.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_title": "KP Plus",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_popup": "options.html"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "manifest_version": 3
}