Bug 947044 - Provide a suggestion when throwing ReferenceError: <name> is not defined. r=luke
Bug 947044 - Part 2: Fix tests that check ReferenceError's message. r=gavin
bug 1058044 - Background-blend-mode no longer blends correctly for <html> elements. r=roc
Bug 1069401 - UserAgent cannot be changed for specific websites in workers, r=khuey, r=bz
Bug 1069857- clear seek timestamp in time. r=jwwang r=cpearce