Examine source code of SteamDB Rating for ITAD

{
  "manifest_version": 3,
  "name": "SteamDB Rating for IsThereAnyDeal",
  "version": "1.0.0",
  "description": "Displays SteamDB ratings next to game entries on IsThereAnyDeal.com.",
  "browser_specific_settings": {
    "gecko": {
      "id": "itad-steamdb-rating@nickmarc.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://isthereanydeal.com/*",
    "https://store.steampowered.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://isthereanydeal.com/*"
      ],
      "js": [
        "dist/content.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "service_worker": "dist/background.js",
    "scripts": [
      "dist/background.js"
    ]
  }
}