How did you restore the backup? Firefox saves your bookmarks in your profile folder, which is normally hidden by Windows. To ease the process, please change the Windows setting so you can see hidden files and folders. http://windows.microsoft.com/en-us/windows/show-hidden-files Then in your restored files (or in your backup), look for your profile folder under C:\Users\''username''\AppData\Roaming\Mozilla\Firefox\Profiles Depending on how your backup software works, this whole path or some party of it may be inside some other folder. More info on how Firefox sets up profile folders can be found in this article: [[Profiles - Where Firefox stores your bookmarks, passwords and other user data]]. Ultimately, you want to find a folder named '''bookmarkbackups''' and then use the Restore feature to replace the existing bookmarks in your newly installed Firefox with your old bookmarks. See: [[Restore bookmarks from backup or move them to another computer]]. Alternately, if you find that you have two parallel profile folders, and old one and a new one, you could edit a Firefox configuration file to point Firefox to the old one. More details on that if it seems relevant. Any luck?