Examine source code of Mordor by bg

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#6e2601",
      "tab_background_text": "#ff6430"
    }
  },
  "version": "2.0",
  "name": "Mordor by bg",
  "manifest_version": 2,
  "description": "From a self-Painted computer picture, created for one of my favorite movies!"
}