Feature Request: Rolling restore of tabs

When i restore windows with large numbers of tabs (for instance, after a chrome update), rather than trying to restore all 20-30 tabs in a given window at once (which may push chrome into a very bad state), load a couple tabs, then load another couple as those finish, then a couple more as _those_ finish, etc.  Spread the resource demand over some time rather than all at once, where chrome misbehaves badly.