Firefox is showing my bookmarks when a webpage is opened, and I would like it to show another set of bookmarks when a new empty tab is opened. Firefox is telling me to "manage bookmarks" but I don't see another category which is for the bookmark toolbar shown on a new tab, all bookmarks are shown in the widget next to the search bar. I know I can move the widget, but I want to use both rows for different bookmarks. Is it possible?