Missing "Undo Close Tab" Function

The ArcSphere browser does not provide a function or option to instantly "Undo" the closure of the last tab(s). When a tab is accidentally closed (a high-risk action in ArcSphere due to the lack of a pre-deletion prompt), the user is forced to navigate through their full browsing history to manually locate and restore the lost page, leading to significant frustration and loss of workflow context.