Works right now as 28-05-2025. It opens in a new tab, and provides you the links, you just have to right click the option you want and 'save link as'. Serves videos up to 360p with audio, and video together. Due to youtube restrictions, higher resolutions come with separated audio. Just download video and audio links, and merge them with Capcut or some other free program. There are free webpages that do that online if you don't have good videocard to do it yourself quickly. All other Firefox extensions charge for it and don't do it for free, so this is the best solution until other extensions like Easy Youtube Downloader get updated.