Examine source code of FutureHeader

{
  "theme": {
    "images": {
      "theme_frame": "FutureHead.jpg"
    },
    "colors": {
      "frame": "#302525",
      "tab_background_text": "#08f3f7"
    }
  },
  "version": "2.0",
  "name": "FutureHeader",
  "manifest_version": 2,
  "description": "I designed this header in memory to my childhood. Captain Future is my hero all the time and I enjoy today as adult always his adventures in space."
}