AutoSandbox only sandboxes things that the algorithms rate as suspicious. And of course, the algorithms are still being refined.
The Pro version also has a manual sandboxing capabiity, so if you want to sandbox your browser, for example, it will just do it, and create the entire virtual environment for you. You can control its settings as in the attachment. If you want to exercise the AutoSandbox to try it, you can usually execute a little known unsigned program from a flash drive and make it happen-although even some of those are already in the database.