Examine source code of Fire Rift

{
  "theme": {
    "images": {
      "theme_frame": "thefailiestofallfails.jpg"
    },
    "colors": {
      "frame": "#595757",
      "tab_background_text": "#bf6000"
    }
  },
  "version": "2.0",
  "name": "Fire Rift",
  "manifest_version": 2,
  "description": "A persona made with the wallpaper available on the RIFT website.\n\nNOTE: To preserve quality, the image is only 1920 pixels wide, therefore if for some reason you have a huge monitor this may look off."
}