History.dat
history.dat stores browsing history. Browsing history is a list of all the pages visited within a time period defined in. It's not to be confused with session history, which controls the Back and Forward buttons, or download history, which stores history on files saved to the hard drive or opened with external programs. The History Sidebar provides an interface to view and edit this file.
Editing
Because of the complexity of the Mork storage format, it's not recommended this file be editing manually. Changes can be made through the History Sidebar.
Moving
This file can be moved to a different profile without any extra effort.
Deleting
Deleting bookmarks.html will delete your browsing history. A new file containing browsing history will be created on start up or when it is first needed.