If you want get a Visual Overview of Your Firefox Browsing History. Try this History Tree, a Firefox add-on. Firefox basically keeps the history of thd domain and page that has been visited. But, it does not display information about the time the websites were visited or their relation. So to lack, Firefox add-on History Tree comes into play.
This add-on Shows your browsing history as a tree of tabs, with thumbnail screenshots of the web-pages in every tab you have opened.
Download Firefox History Tree add-on.