If you still have the Sync key and the Sync password and email address that you used to register then you can setup a sync account and retrieve data that you have stored on the sync server. You can enter the account name (email address) and password and the Sync key. * Open "Tools > Options > Sync" or "Firefox > Set Up Sync" * Click "Set Up Firefox Sync" to go to "Firefox Sync Setup" * Click "I already have a Firefox Sync account" : Connect * Click "I don't have the device with me" at the bottom You can click the "Sync Options" button to select what to sync. * Bookmarks Passwords Prefrences History Tabs * Merge this computer's data with my Sync data * Replace all data on this computer with my Sync data * Merge this computer's data with my Sync data