There may be times where we don't have a screenshot to display in our thumbnail menu, so we should have an empty state that looks nice, too. I will post assets here when they are ready
This was taken care of a while ago, when work on the start page and tab menu was underway. Marking as fixed.
fixed on aurora as well
Verified fixed on: Nightly Fennec 13.0a1 (2012-03-06) Device: HTC Desire Z OS: Android 2.3.3