YouTube Tweaks is a subscription-based browser extension available on Firefox, designed to enhance the user experience on YouTube's desktop version. This tool offers a plethora of customization options, allowing users to alter the layout and functionality of the platform to better suit their preferences. Key features include the ability to change the number of videos displayed per row, adjust thumbnail sizes, and hide various elements such as profile pictures and irrelevant search results.

In addition to layout modifications, YouTube Tweaks also introduces several usability enhancements. Users can auto-expand comments and video descriptions, disable auto-pause features, and customize the appearance with dark/light themes or custom CSS/JavaScript. The extension aims to streamline navigation by providing shortcuts for various functions, such as opening search results in new tabs and redirecting the YouTube logo to the subscriptions page, making it a comprehensive tool for anyone looking to personalize their YouTube viewing experience.