For normal browsing the session restore is fine as is, but as soon as anything starts going wrong it becomes completely worthless as by the time I have noticed something's up it has overwritten the normal backup session a few times over. As a result I have to restore back to the last upgrade or something stupid, it would be nice if I could tell session restore to keep additional backup files during normal operation, it's not like they take up much disk space. Ideally something like keeping one a day for a week and one each hour of the current day would be nice. Also the option to take them manually would be welcome too.