One solution is to undo the recovery (rollback?) and this should restore my previous files and then I can try the recovery again (correctly).
My system restore was also reset and all the recovery points were gone.  I dont know anything about Caches or system files etc. to know how to fix this  BUT IT IS IMPORTANT FOR ME TO GET MY DATA BACK. PLEASE CAN YOU HELP.

Hello, several months ago I carried out a recovery from a 2011 backup file i created. This solved some important issues on my desktop. But i must have configured the recovery wrong because after it was done my FIREFOX BOOKMARKS AND HISTORY were all gone. The recovery used up nearly all my C drive so i think the data is still there and it added all the old data instead of just MERGING? them. One solution is to undo the recovery (rollback?) and this should restore my previous files and then I can try the recovery again (correctly). My system restore was also reset and all the recovery points were gone. I dont know anything about Caches or system files etc. to know how to fix this BUT IT IS IMPORTANT FOR ME TO GET MY DATA BACK. PLEASE CAN YOU HELP. I am running windows xp sp3. and i recently update to FF20. Many Thanks.