Bookmark Backup and Windows 7

Updating Rosie's computer (Rosemary-PC) to Windows 7.
Forgot to backup bookmarks.
Found that during the update, the computer saved all the old settings in a file named "Windows.old" under C.
Inside this file, I found where the bookmark backups are kept. Fortunately, Firefox had been saving backups of the bookmarks automatically.
I went to Firefox, Bookmarks, Show All Bookmarks, Import and Backup, Restore, Choose File.
Then I found the backup file here (it's the same file path for normal backups, except it is under Windows.old instead of just under C): Windows.old/Users/Theresa/AppData/Roaming/Mozilla/Firefox/Profiles/abkomoeq.default/bookmarkbackups/ the backup file was here, as a .json. (AppData is normally a hidden folder, so you may have to "show hidden files and folders" to be able to view it.)