Bug 864255: Move more of PeerConnectionMedia shutdown to occur synchronously r=ekr
Bug 871350 - Uplift Add-on SDK integration branch to Firefox
Bug 857987 - Add a 'Night Mode' to Reader Mode. r=mfinkle
Bug 857987 - (Part 2) Use flex to size segmented buttons in reader mode menu. r=mfinkle
Bug 870858 - Use scaled image in "tabs from last time" section. r=bnicholson