Examine source code of Crimean Forest

{
  "theme": {
    "images": {
      "theme_frame": "Crimeanforest.jpg"
    },
    "colors": {
      "frame": "#13f51b",
      "tab_background_text": "#fcfcf9"
    }
  },
  "version": "2.0",
  "name": "Crimean Forest",
  "manifest_version": 2,
  "description": "In the Crimean forest"
}