Examine source code of HR Horses Tool

{
  "manifest_version": 3,
  "name": "HR Horses Tool",
  "version": "1.1.6",
  "description": "Collects Horse Reality horse data and exports a CSV importable into HR Horses Tracker.",
  "browser_specific_settings": {
    "gecko": {
      "id": "hr-horses-tool@hr-horses.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "16": "icons/idle-16.png",
    "32": "icons/idle-32.png",
    "48": "icons/idle-48.png",
    "128": "icons/idle-128.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "*://www.horsereality.com/*",
    "*://v2.horsereality.com/*"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "HR Horses Tool",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/idle-16.png",
      "32": "icons/idle-32.png",
      "48": "icons/idle-48.png",
      "128": "icons/idle-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.horsereality.com/horses/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}