The Tab Session Manager needs to automatically save all of your open tabs (aware of Workspaces and tab Islands) so that you can reopen them in case you need and should sync across all your devices with your opera account.

This is really useful if you use Opera on multiple devices and you want to have the same tabs opened and closed across your devices (for example your desktop and your laptop, or your desktop and your phone).

This could also be useful in the event of a crash where you lose your tabs so with a Tab Session Manager, you could recover all of your tabs and Workspaces easily.