In the .mozilla profile directory, there are a few key files that contain the personalized installation settings.

Bookmarks and browsing history

places.sqlite - This file contains all your Firefox bookmarks and a list of websites you have previously visited.

Passwords

Your passwords are stored in two different files, both of which are required:

key3.db - This file stores your key database for your passwords.
signons.sqlite - Saved passwords.

Cookies

cookies.sqlite - This file stores your cookies.