Great addon BUT after Firefox updating to the last version it not working and seems that my all tab history erased!!! The store.json frile is almost empty and there are no saved tabs there!

Several times all of my saved tabs have disappeared when Firefox updated -- and there is no way to retrieve them! This had appeared to be a very useful extension, but now I have no confidence in it.

Could you add the option to auto add to the one tab list tabs that have not been visited in for example a week? (With the amount of time being configurable up to a month or something like that)

Could you also add the ability to manually create new tab groups and be able to contract and expand the listed tabs on the groups?

i just suddenly lost all my saved books from this shitty extension.do not touch