The Vivaldi browser has just released 2.3 and now supports tab stacks.
Vivaldi browser supports Tab Stacks. Tab stacking is a feature designed to create groups of tabs to help you better organize your browsing.
Until the previous version, 2.2, you had to create these card stacks yourself by hand and according to your needs. With today's version, the Vinaldi browser brings automatic tab stacking. After enabling this setting, each time you open a link from an active tab, it is automatically added to a stack of tabs.
You can enable this feature from Settings> Tabs> New Tab Location> Select "As a Stack of Related Tabs".
In this update, users can additionally enable frequently visited pages in the Addressing drop-down field. This new version also improves screenshot capture.
You can download this update Vinaldi from here.
See also a relevant video of the company: