Examine source code of Howling Black Wolf

{
  "theme": {
    "images": {
      "theme_frame": "HBW_header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#f4f5ab"
    }
  },
  "version": "2.0",
  "name": "Howling Black Wolf",
  "manifest_version": 2,
  "description": "A black wolf howling at a full moon, with soft yellow text and black gradient background. \nEnjoy."
}