Bookmarks are backed up and can be restored, but browsing history isn't backed up - no way to restore history in Firefox.

As far as the instructions you read - specifically, which support page did you read?

I went to bookmarks,show all, import & backup, restore, and choose file at which point I had a choice of numerous favorite links to restore from and had no idea which to choose.

Choose one at the top of the Restore listing, with the largest number of "items". (that's the number of bookmarks in that bookmarksbackup file)

the-edmeister said

Choose one at the top of the Restore listing, with the largest number of "items". (that's the number of bookmarks in that bookmarksbackup file)

I am having the same problem. I followed the instructions for restoring bookmarks. I chose the date with the largest number. I did get some of my bookmarks back, but not all. What else can I do?