Examine source code of Tanatron

{
  "theme": {
    "images": {
      "theme_frame": "persona_tanatron_upper.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#cccccc"
    }
  },
  "version": "2.0",
  "name": "Tanatron",
  "manifest_version": 2,
  "description": "For a skull-crushing brazilian death metal band, Tanatron."
}