Examine source code of BOOTH持ってるよリスト

{
  "name": "BOOTH持ってるよリスト",
  "version": "2.1.2",
  "manifest_version": 3,
  "description": "『BOOTH持ってるよリスト』は、BOOTHの商品をリストにして管理・共有できるサービスです。",
  "browser_specific_settings": {
    "gecko": {
      "id": "{4d18dfd6-304e-45dd-94ca-5a0cdde8b608}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://booth.pm/ja/items/*",
        "https://booth.pm/*/items/*",
        "https://*.booth.pm/*/items/*",
        "https://*.booth.pm/items/*"
      ],
      "js": [
        "content_scripts/item_page.js"
      ],
      "css": [
        "css/item_page.css"
      ]
    },
    {
      "matches": [
        "https://booth.pm/*",
        "https://*.booth.pm/*"
      ],
      "js": [
        "content_scripts/booth_header.js"
      ]
    },
    {
      "matches": [
        "https://x.com/*",
        "https://*.x.com/*"
      ],
      "js": [
        "content_scripts/twitter_profile.js"
      ],
      "css": [
        "css/twitter_profile.css"
      ]
    },
    {
      "matches": [
        "https://motteruyo.com/*"
      ],
      "js": [
        "content_scripts/list_page.js"
      ],
      "css": [
        "css/bulma.css",
        "css/list_page.css"
      ]
    },
    {
      "matches": [
        "https://accounts.booth.pm/library*"
      ],
      "js": [
        "content_scripts/library_page.js"
      ],
      "css": [
        "css/bulma.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "https://motteruyo.com/*"
  ],
  "icons": {
    "16": "icon/icon16.png",
    "48": "icon/icon48.png",
    "128": "icon/icon128.png",
    "512": "icon/icon512.png"
  }
}