Examine source code of Sunset in the Forest

{
  "theme": {
    "images": {
      "theme_frame": "1a_Sonnenuntergang_im_Wald.jpg"
    },
    "colors": {
      "frame": "#ff6f00",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Sunset in the Forest",
  "manifest_version": 2,
  "description": "The Sundown was photographed out of the window of a driving car.\nDer Sonnenuntergang wurde aus dem fahrenden Auto heraus fotografiert."
}