Examine source code of Skyroom Customizer

{
  "manifest_version": 3,
  "name": "Skyroom Customizer",
  "version": "1.1.9",
  "description": "شخصی‌ سازی ظاهر اتاق‌ های اسکای‌ روم",
  "browser_specific_settings": {
    "gecko": {
      "id": "@skyroom-customizer",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "unlimitedStorage"
  ],
  "host_permissions": [
    "https://*/ch/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon16.png",
      "128": "icons/icon16.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/ch/*"
      ],
      "js": [
        "emojis.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*/ch/*"
      ],
      "js": [
        "main-world.js"
      ],
      "run_at": "document_idle",
      "world": "MAIN"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "Fonts/*.woff2",
        "help-texts.json"
      ],
      "matches": [
        "https://*/*"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon16.png",
    "128": "icons/icon16.png"
  }
}