Puntuado con 5 de 5 estrellas

I use this addon each and every day.
Probably my most beloved addon.
But I have suddenly for unknown reason lost the "History" feature.
I‘ve tried install older Firefox versions without any luck.
How can I get it back?
What are the correct settings for it in about:config?

Esta valoración es de una versión anterior del complemento (4.9.17.1-signed).