I recently pinned Firefox to my Taskbar. When I right click to choose a task to perform (e.g. Open New Private Window), Alson with the list of task choices, there is a long list with the heading "Frequent" of sites that I have visited. So far, the on;y way i can get rid of the items in Frequent is to right click and "Remove from this list" which is time consuming and annoying. How do I get rid of/stop this list from showing