Examine source code of Sidebar Game Break

{
  "manifest_version": 2,
  "name": "Sidebar Game Break",
  "version": "1.0",
  "description": "Sidebar panda game for quick breaks without leaving your work.",
  "permissions": [
    "storage"
  ],
  "sidebar_action": {
    "default_title": "Game",
    "default_panel": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sidebar-game-break@ayush0x1",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}