FYI. Sync isn't to be used for backup. It sync between active device to sync server to another device with the same sync login. It shouldn't need a code if the login is the same. To preserve your data/login/pswd you need to backup those data to import them to the new browser to insure they remain otherwise if the system that had the data gets wiped or removed from device all the sync data will not match and it could possible remove the sync data since it has no other device to sync back to the data.