Using latest Aurora build (dec 05, ff 52) on a nexus 4. My profile has some of the "clear private data on exit" checkboxes (under settings -> privacy) set. All of them except downloads, synced tabs, and saved logins are checked. However when I quit Firefox from the menu the history data is not cleared and my top sites panel still shows sites I visited the next time I open Aurora. This has been happening for a while (a few months at least) - it used to be intermittent but now it seems to happen 100% of the time. If we want to remain positioned as a privacy respecting browser it's important that our privacy features work properly.