Add a keyboard shortcut to exit Split View (Vertical Split Page)

'''Feedback Content''' I really love Firefox’s new Split View feature. The Alt + Click shortcut to create vertical split pages works perfectly and greatly improves my multitasking workflow for side-by-side tab comparison. However, there is currently no native keyboard shortcut to cancel / exit Split View and separate tabs without closing either page. To undo split view, users have to rely entirely on mouse operations: right-click tabs or click the divider menu. This breaks keyboard-first browsing efficiency and creates unnecessary extra clicks every time I finish comparing pages. '''Feature Request''' Please add a dedicated built-in shortcut to quickly separate tabs and close Split View. A simple key like Esc or a custom combination such as Ctrl+Shift+Alt+X or something would be ideal, matching the convenient Alt+Click way to trigger split view.