I lost 5 years of bookmarks after running tfc.exe. I used tfc.exe to clear some space on my full hard drive and then firefox would not load. I restored to most recent checkpoint, but firefox loaded as if I was a new user.
I have XP home sp3. I tried looking in recycle bin, but couldn't find any places.sqlite files, where Firefox bookmarks are stored. To make matters worse, I never made any backups of my bookmarks. I know, serves me right.