Software :: Firefox Database Design Documentation?

Perhaps this is not the best place to ask, however, I have not had any luck finding answers elsewhere and I know the someone here knows the answer.In a nutshell, I am looking to purge information which I do not want retained (for privacy reasons) from the various database files used by Firefox. Using the available preference settings I have configured Firefox to clear everything on quit except for:

Saved Passwords
Site Preferences
Browsing History

I have no concern with the first two categories. It is the third one which I wish to fine tune beyond what I can do within the Firefox app. I wish to keep those sites which I have typed in so that they can be accessed by the Old Location Bar add-in - so that when I enter "li" in the address bar I am directed to linuxquestions.org. However, I do not want the data stored which allows Firefox to display previously visited links in a different color (and probably more data as I dig further).

So my plan would be to build some scripts to remove the offending data from the applicable sqlite databases (places.sqlite in the case of browsing history) by brute force. As mozilla.org does not expect users to do this they do not seem to have any documentation readily available describing the layout and use of the databases behind Firefox.So my question is... can someone point me to a source of the documentation I am seeking?