Should Facebook dress as Snapchat for Halloween? The company has unveiled new Facebook Live masks for the spooky soiree with an eerie resemblance to those from its social media rival. To don them, you just start streaming, tap the upper left magic wand and select the masks icon from the creative tools tray below. You can choose a skull, evil queen, "limited edition" pumpkin or witch masks. Facebook also unveiled Halloween Reactions, including a "grimacing jack o'lantern" to express anger, and a cackling witch "smile."