Examine source code of Chess Focus

{
  "manifest_version": 3,
  "name": "Chess Focus",
  "version": "1.0.0",
  "description": "Hide distracting elements on Chess.com for a cleaner, more focused playing experience.",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://*.chess.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.chess.com/*"
      ],
      "css": [
        "content.css"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Chess Focus",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "chess-focus@vanzsom.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}