Examine source code of DevShortcuts Mastery

{
  "manifest_version": 3,
  "name": "DevShortcuts Mastery",
  "version": "1.0",
  "description": "Level up your coding speed! A minimalist mini-game to test and memorize essential IDE and DevTools keyboard shortcuts.",
  "icons": {
    "48": "icon.png"
  },
  "action": {
    "default_popup": "index.html",
    "default_title": "DevShortcuts Mastery"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a45885b-badf-4f52-9ec4-ea8731b12c2c}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}