Tried every setting I could to prevent child tabs from every being closed, but I was still losing tabs when closing *some* parents. Tried promotion, dummy, only when tst is open, etc.

Когда уже выйдет версия под последнюю лису? Я годами использовал аддон и без него сейчас как без рук. Поставлю 5, когда обновите.

Either crashes or intentional closures.

Awesome otherwise.

Working in 58, but after I restart, all nesting is gone...