Marc Malkin Senior Film Awards, Events & Lifestyle Editor Sarah Chalke insists she doesn’t know if “Firefly Lane” is getting a second season.“From your mouth,” she says when I ask her about the future of the Netflix series on the latest episode of the “Just for Variety” podcast. “I’m so hopeful.”The series follows the lives of childhood best friends Tully Hart (Katherine Heigl) and Kate Mularkey.