Examine source code of KalleMarx

{
  "theme": {
    "images": {
      "theme_frame": "marx.jpg"
    },
    "colors": {
      "frame": "#7d4599",
      "tab_background_text": "#e31d07"
    }
  },
  "version": "2.0",
  "name": "KalleMarx",
  "manifest_version": 2,
  "description": "Der tote Hund beisst noch\nKarl Marx"
}