HI, If you did not make a back up of your profile, the data may no longer be there. Please make sure by looking for the profile [[Use the Profile Manager to create and remove Firefox profiles]] and [[Profiles - Where Firefox stores your bookmarks, passwords and other user data]] Please try the following troubleshooting steps to set up the new sync if you still have the data backed up locally. #Back up your profile[[Back up and restore information in Firefox profiles]] #[[How to update to the new Firefox Sync]]