Revert previous change to YARR (bug 824856, r=sstangl, a=lsblakk).
Bug 842290 - Make privacy preference tab always check for permanent private browsing status changing, regardless of whether pref changes apply instantly. r=ehsan a=lsblakk
Bug 844561 - Avoid prompting about closing private windows unnecessarily. r=ehsan a=lsblakk