Same procedure as every year, James.

Save your Christmas browsing session from this year and bring it back next year.

Vivaldi allows you to save your current open tabs as a named session, so you can open the tabs whenever you need them.

To save all open tabs in one or all windows as a session:

1. Either, go to the  Vivaldi menu > File > Save All Tabs as Session, type “Save All Tabs as Session” in Quick Commands, or click the + “Save Tabs as Session” button in the Sessions Panel.
2. Give the session a name.
3. Decide whether you want to save tabs in the current window only or from all windows, and whether to save tabs from all Workspaces as well.
4. Click Save.

To save only some tabs as a session:

1. Use the Ctrl / ⌘ / Shift key to select the tabs you want to save as one session.
2. Then, either right-click on one of the selected tabs and select Save # Selected Tabs as a Session from the context menu or type “Save Selected Tabs as Session” in Quick Commands.
3. Give the session a name.
4. Click Save.

To open a saved session:

1. Either, go to the  Vivaldi menu > File > Open Saved Session or type “Open Saved Sessions” in Quick Commands.
2. Select the saved session you want to open.
3. Decide whether to open the session in a new or current window.
4. Click Open.