Examine source code of Black Metal 666

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_blackmetal.jpg"
    },
    "colors": {
      "frame": "#f5f0f0",
      "tab_background_text": "#faf7f7"
    }
  },
  "version": "2.0",
  "name": "Black Metal 666",
  "manifest_version": 2,
  "description": "BLACK METAL! Lay down yout soul to the gods rock n' roll!"
}