Recovering Firefox 3 History: A Step-by-Step Guide

Preliminary steps (do these first)

1. Stop using Firefox and minimize disk writes. Continued use can overwrite deleted data.
2. Make a full copy of the Firefox profile folder (copy to an external drive or another folder). Work on copies only.
3. Check for automatic backups: look for places.sqlite.corrupt, places.sqlite-journal, or files in bookmarkbackups/.

Tools to use

• SQLite browsers/viewers
  • Use an SQLite viewer (DB Browser for SQLite, SQLiteStudio) to open places.sqlite and inspect the moz_places and moz_historyvisits tables.
• Recovery utilities
  • Recuva (Windows) — can undelete removed files from the filesystem.
  • PhotoRec / TestDisk — recover deleted files including SQLite databases; works across platforms.
  • R-Studio / EaseUS Data Recovery Wizard — commercial recovery tools with deep scanning.
• Forensic tools (advanced)
  • Autopsy / Sleuth Kit — recover artifacts and analyze disk images.
  • FTK Imager — create forensic images for safe analysis.
• Hex editors
  • When journal or partial files exist, a hex editor can sometimes extract fragments or salvage SQLite pages.

Recovery techniques

1. Open existing places.sqlite
   • If file opens, export important tables (moz_places, moz_historyvisits) to CSV for backup.
   • Run integrity checks in SQLite viewers; attempt REINDEX or VACUUM only on copies.
2. Use journal or corrupt files
   • Rename places.sqlite-journal to places.sqlite on a copy and try opening.
   • If places.sqlite.corrupt exists, try opening or renaming to .sqlite.
3. Undelete files
   • Run a recovery tool (Recuva, PhotoRec) pointing at the drive where the profile lived.
   • Recover any places.sqlite files, then inspect with an SQLite viewer.
4. Extract history from backups or caches
   • Check OS-level backups (Shadow Copies on Windows, Time Machine on macOS) for older profile folders.
   • Browser caches or synced data (if sync was used) might contain URLs—search for .sqlite and .json files.
5. Parse SQLite file fragments
   • If file is partially overwritten, SQLite page-based recovery may be possible using forensic tools or scripts that scan for SQLite headers (SQLite format 3) and reconstruct pages.
6. Rebuild history from other sources
   • Check search engine histories, Google/Web service logs (if signed in), router logs, or DNS logs for visited hostnames.
   • Check system-level files like prefetch (Windows) or browser cache to infer visited URLs.

Practical example: undelete and inspect

1. Copy entire profile drive as a disk image (recommended) or at least the profile folder.
2. Run PhotoRec on the image; recover files with names containing places.
3. Open recovered places.sqlite in DB Browser for SQLite and export moz_places/moz_historyvisits.
4. Import recovered URLs back into a current Firefox profile via bookmarks or a new places.sqlite (advanced — replace only on copies).

When recovery fails

• If sectors are overwritten, complete recovery may be impossible.
• Consider professional data recovery services or forensic specialists if the data is critical.

Safety and best practices

• Always work on copies.
• Don’t run disk-intensive operations on the affected drive.
• Keep regular backups: enable system backups and periodically export bookmarks/history.

If you want, I can:

• Provide exact SQLite queries to extract URLs and visit timestamps from places.sqlite.
• Suggest step-by-step commands for PhotoRec/TestDisk or show how to use DB Browser for SQLite.