Examine source code of Logs.TF Extended

{
  "manifest_version": 3,
  "name": "logs_tf_extended",
  "version": "1.2.4",
  "description": "Adds ETF2L and RGL name and player division info to played games on logs.tf",
  "permissions": [
    "storage"
  ],
  "icons": {
    "184": "icons/logs_tf_logo.jpg"
  },
  "host_permissions": [
    "https://api-v2.etf2l.org/*",
    "https://rgl.gg/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.logs.tf/*"
      ],
      "js": [
        "display_extended_column.js"
      ]
    }
  ],
  "action": {
    "default_icon": "icons/logs_tf_logo.jpg",
    "default_title": "LogsTF Extended",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f63b222-297a-4f42-9ecb-5946054dd9d5}"
    }
  }
}