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Undo closing tabs or deleting a group

When you close several tabs at once, or delete a group, a pin, or a Workspace, a message at the bottom of the panel offers Undo for 8 seconds. Undo puts everything back where it was.

You closed four Codeberg tabs together, and one of them still had a review you hadn’t sent.

  1. At the bottom of the panel, in the message such as “Closed 4 tabs”, select Undo before the message goes.

The tabs, group, pin, or Workspace come back where they were.

  • ⌘Z (Ctrl+Z on Windows and Linux) also undoes while the message shows, unless the page or a text field has the focus. Those keep ⌘Z for their own undo.
  • The message stays while the pointer is on it or it has the focus.
  • Dismiss next to Undo closes the message and makes the change for good.
  • Only the latest change can be undone. A new close or delete replaces the message, and makes the one before it for good.
  • Closing the window or quitting Sval while the message shows makes the change for good.
  • Your other devices hear of the change only once the message goes.
  • Closing a single tab shows no message. ⇧⌘T (Ctrl+Shift+T on Windows and Linux) reopens the tab you closed last.

© 2026 Ellm Tree, Inc. Sval is not officially associated with Mozilla or its products. Firefox is a trademark of the Mozilla Foundation in the US and other countries.