Previews For TTV YT is a Firefox extension designed to enhance the streaming experience on Twitch and YouTube. It provides live previews of streams when hovering over them, allowing users to quickly assess content without navigating away from their current page. The extension includes various quality of life improvements, such as sidebar favorites, multi-stream capabilities, and chat overlays, making it easier for users to manage and enjoy multiple streams simultaneously.

Among its many features, the extension offers image and live video previews, volume control, auto-refresh on player errors, and a customizable chat experience. Users can also take advantage of tools like the Auto Channel Points Clicker, Clip Downloader, and the ability to fast-forward streams. The extension's design allows for keyboard shortcuts and personalized settings, ensuring a tailored viewing experience that caters to individual preferences on both platforms.