V3 - Get Old YouTube Layout Launcher is a userscript designed for the Firefox platform that enables users to experience the 2013 YouTube user interface once again. This application works by loading the Project VORAPIS JavaScript app, which effectively recreates the old layout on the current YouTube site. It is specifically compatible with the main YouTube domain, ensuring a seamless transition back to the classic UI without any interference with YouTube or Google services.

The launcher operates under a subscription-based license and falls under the category of Internet & Network tools, focusing on search and lookup functionalities. Users can enjoy the nostalgic design while navigating YouTube, as the script does not exploit or modify any underlying Google structures. It provides a straightforward way for those who prefer the older design to enjoy their viewing experience.