Examine source code of Dark Black Sabbath

{
  "theme": {
    "images": {
      "theme_frame": "BlackSabbath.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#828282"
    }
  },
  "version": "2.0",
  "name": "Dark Black Sabbath",
  "manifest_version": 2,
  "description": "All the other Black Sabbath personas sucked (in my opinion). So here's a nice bitchin' one from me that I believe captures the eery and dark nature of Sabbath."
}