Speaking of private data and encryption, do you know which FF file is responsible for History data? I know the Bookmarks json file but I'm looking to keep my history file as a backup too (which I believe FF doesn't backup like it does bookmarks). I hope it isn't places.sqlite file because it gets ridiculously huge even after you wipe your data clean.

I wish to rely on my own backup system for both bookmarks and history data as both of them are important on continuous basis and both of them should be user's own responsibility (unlike what delicious or many other bookmarks syncing services may tell you).