Examine source code of predal_2007

{
  "theme": {
    "images": {
      "theme_frame": "predal2007.JPG"
    },
    "colors": {
      "frame": "#0ac72a",
      "tab_background_text": "#e7ff0a"
    }
  },
  "version": "2.0",
  "name": "predal_2007",
  "manifest_version": 2,
  "description": "some landascape taken from the carphatian mountain"
}