Examine source code of LTROI - Puzzled

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#fafafa"
    }
  },
  "version": "2.0",
  "name": "LTROI - Puzzled",
  "manifest_version": 2,
  "description": "Let the Right One In (Låt den rätte komma in) inspired theme. \n\nEli and the Rubik's Cube."
}