Examine source code of Spycheck

{
  "theme": {
    "images": {
      "theme_frame": "spycheck.jpg"
    },
    "colors": {
      "frame": "#ffe091",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Spycheck",
  "manifest_version": 2,
  "description": "All achievement icons and likenesses of Team Fortress 2 are copyright of Valve Corporation.\nThoughtfully resized and positioned by qpingu of the TF2 community."
}