Does exactly as it claims. : )

please add merge, skip duplicate tab, update/add with this session, edit

То что нужно лучшего и не сыскать. Хорошо что можно писать на GitHub пожелания, разраб потихоньку что-то допиливает❗
Респект❗

The best OneTab alternative. It's even better.

Best session manager ever because it handles tree-style tabs from Sidebery... but currently a few issues exist and the auto-backup and cloud backup stopped working.

Долго искала решение задачи по восстановлению утерянной сессии. Найденное дополнение отлично справилось! Благодарю разработчика! Рекомендую оптимизировать поисковую информацию - дополнение трудно найти!

Great add-on!! I tried many before I settled on this. It has an intuitive UI, loads of features, and is really simple to use.

Some more features I would like are:
1) It would be more useful to save the tab-wise page history so that on restoring a session, I can move back and forth in history (granted, this may not work properly all the time due to caching, etc., but I still think access to a simple history would be very helpful).
2) It would be awesome if it were also supported on Firefox for Android.

Surprisingly intuitive and does everything I expected it to. Kudos.

Cloud sync and tab restoration
beautiful