Installed this with the hopes of managing the many tabs I have opened.

OneTab took all my tabs, converted it into a list that allowed me to easily review and delete the ones I no longer need.

However, when I tried to restore the clean list of tabs from OneTab back into FireFox, it only restored 5 tabs out of 84.

Buggy and cannot be relied upon if you want to cleanup your tabs. I have since deleted/uninstalled this extension.