Firefox History is very useful when you want to sneak peak your children browsing habits or want to find the lost web page address you visited earlier. Once the firefox history is delete it is not possible to recover it. But, the history can be recovered as the historical information of firefox browser is stored in various SQLite databases.
ff3hr is a firefox history recovery tool that allows you to recover the deleted history records from Firefox 3.5. The firefox browser uses different SQLite databases to store the history, and the tool search and recover records from four different tables in a whole disk image.
Note - To install the userscript, install firefox browser and Greasemonkey Script.