Bug 856807. Add apparently-pointless call to SetClipRect(nullptr) to avoid Android regression. r=mattwoodrow
Bug 860524. Remove hacky (and buggy) pseudo-destruction of DisplayItemClips created by GetCurrentClip; ensure that they're all destroyed properly when the arena goes away, by tracking them explicitly in nsDisplayListBuilder. r=mattwoodrow
Bug 859154 - add a pageshow promise to addTab. r=sfoster
Bug 859094 - Remove some additional cruft left over from selectionoverlay context menu handling. r=fryn
Bug 854960 - implementing pinned state graphic on fx start tiles. Also fixes selected state. r=fryn