Hi, which folders of mozilla firefox / iceweasel LINUX browser i need to backup so i can restore my bookmarks?

I mean just copy these folders/files back after clean installation and bookmarks are there.. thx

: so far i found these folders containing my bookmarks:

1) /home/username/.mozilla/firefox/bookmarks/places.sqlite (this alone did not helped to restore bookmarks)
2) /home/username/.mozilla/firefox/default/bookmarkbackups/bookmarks-2014-02-11.json