Hi genaro, I love this idea. Unfortunately, the top level categories (Bookmarks Toolbar, Bookmarks Menu, Other Bookmarks) aren't editable in the interface, there isn't a setting for that. Possibly someone knows a trick to override them either for the current session using a script, or persistently using a style rule, but I haven't research it. By the way, the original name for that category was "Unsorted Bookmarks" but maybe that was considered judgmental??