Examine source code of HeartlessBlood

{
  "theme": {
    "images": {
      "theme_frame": "Heartless.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "HeartlessBlood",
  "manifest_version": 2,
  "description": "Heartless! If you look close you can see the logo in the footer.... Kingdom Hearts!"
}