Examine source code of HTnini

{
  "manifest_version": 3,
  "name": "HTnini",
  "version": "3.27",
  "description": "Use hattrick players avatars to create your best albums!",
  "action": {
    "default_icon": {
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_title": "HTnini - Create albums with Hattrick players avatars"
  },
  "permissions": [
    "storage",
    "notifications"
  ],
  "host_permissions": [
    "https://*.hattrick.org/*",
    "https://htnini.eu/*"
  ],
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "htnini.css",
        "foils/*",
        "payment.js",
        "cards/*",
        "wc/*",
        "overridetimeoutworker.js"
      ],
      "matches": [
        "https://*.hattrick.org/*"
      ]
    },
    {
      "resources": [
        "tweenmax.min.js",
        "wheel.min.js",
        "html2canvas.min.js",
        "jspdf.umd.min.js",
        "tourguide.min.js",
        "interact.min.js",
        "chart.umd.js",
        "htplayers.js",
        "albums.js",
        "seasons.js",
        "cards.js",
        "casino.js",
        "changelog.js",
        "rules.js",
        "marketplace.js",
        "shop.js",
        "records.js",
        "barter.js",
        "finance.js",
        "settings.js",
        "achievement.js",
        "goldenticket.js",
        "silverticket.js",
        "artifact.js",
        "rewards.js",
        "christmas.js",
        "foils.js",
        "store.js",
        "battle.js",
        "challenges.js",
        "worldcup.js"
      ],
      "matches": [
        "https://*.hattrick.org/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "worker.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://htnini.eu/*"
      ],
      "js": [
        "site.js"
      ]
    },
    {
      "matches": [
        "https://*.hattrick.org/*"
      ],
      "js": [
        "overridetimeout.js",
        "jquery.min.js",
        "purify.min.js",
        "dayjs.min.js",
        "dayjs.utc.js",
        "dayjs.timezone.js",
        "dayjs.customParseFormat.js",
        "dayjs.duration.js",
        "dayjs.init.js",
        "base64.js",
        "queue.js",
        "i18n.js",
        "anniversary.js",
        "htnini.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c1d7f7fc-6579-4ceb-a825-7bb45ecc9d73}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}