Firefox-Hilfeforum

I have a problem, i ve been searching everywhere but nothing about this. I want to disable this bookmarks history in this menu icon near ublock icon>library>bookmarks and here is whole list of last added bookmarks. This activity stream in about config do not work with this. I dont have any folder with these in bookmarks settings, the only place where i can find this list is here. Is there any way to delete this and to stop firefox collecting history of every bookmarks i add there?