Examine source code of Sick, Sad World

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#cdd4cf",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Sick, Sad World",
  "manifest_version": 2,
  "description": "\"Brought back from the grave by black magic, but no one taught them to cross at the green! The Jaywalking Dead! Next on Sick, Sad World\""
}