Examine source code of Really Weird Critters

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#0f0e0e",
      "tab_background_text": "#0f0f0f"
    }
  },
  "version": "2.0",
  "name": "Really Weird Critters",
  "manifest_version": 2,
  "description": "I wished I could visit a Museum of Unnatural History, but, even so, I was glad there wasn't one. ~ Neil Gaiman in Unnatural Creatures\n\nTAGS:\n     fantasy, monsters, weird, strange, strangeness, weirdness, Halloween, October, holidays, Autumn, Fall"
}