Scanguard - Clean & Speed Up is a Firefox extension designed to optimize your web browsing experience by removing clutter and enhancing performance. This subscription-based tool offers a variety of features aimed at cleaning up browsing data, speeding up favorite sites, and reallocating system resources to improve overall browsing speed. Users can enjoy a free trial that provides access to premium services without needing extensive personal information.

Key features include a pop-up blocker to eliminate intrusive notifications, a 'Site Sleeper' function that conserves resources by putting inactive web pages to sleep, and 'Turbo Browsing' which preloads web pages for faster access. Additionally, 'Lightning Loader' gradually loads pages to prevent delays caused by large images. Overall, Scanguard aims to create a smoother, faster browsing experience for users.