Examine source code of Uncle sam 1k.dk

{
  "theme": {
    "images": {
      "theme_frame": "1k_uncle-sam-top.jpg"
    },
    "colors": {
      "frame": "#e4eff5",
      "tab_background_text": "#2f3f4a"
    }
  },
  "version": "2.0",
  "name": "Uncle sam 1k.dk",
  "manifest_version": 2,
  "description": "Uncle sam want you! :)"
}