On the Toolbox start page you will find the most frequently used domains, hostnames and URLs for the profile as a quick access. The four most frequented will each be shown with a screenshot, and we show 10 entries below the search bar without screenshots. This level of personalization will help you quickly switch to the data you most frequently need.
This personalization is a central building block of our service which sadly makes it impossible to delete these lists. Alternatively, you can use different profiles, as each profile has its own personalized list.