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

Simply an amazing tool to save your day!

This is one of those essential addons that you just must have, no questions asked. I configured it to auto-save the tabs every 30 minutes. It has already saved me a lot of time and headaches when I experience crashes, and the browser can't always recover the last session by itself.
Thank you Sienori!