Examine source code of FunPay Real Price

{
  "manifest_version": 3,
  "name": "FunPay Real Price",
  "version": "1.1.2",
  "description": "Shows the real price without FunPay's commission in parentheses next to each listed price",
  "author": "bdvzk",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://funpay.com/lots/*",
    "*://funpay.com/users/*",
    "*://funpay.com/orders/*",
    "*://www.funpay.com/lots/*",
    "*://www.funpay.com/users/*",
    "*://www.funpay.com/orders/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://funpay.com/lots/*",
        "*://funpay.com/users/*",
        "*://funpay.com/orders/*",
        "*://www.funpay.com/lots/*",
        "*://www.funpay.com/users/*",
        "*://www.funpay.com/orders/*"
      ],
      "js": [
        "commissions.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png"
    },
    "default_title": "FunPay Real Price Settings",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bdvzk@proton.me",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}