Examine source code of Summer in December

{
  "theme": {
    "images": {
      "theme_frame": "FFP-SummerinDecember-Header.png"
    },
    "colors": {
      "frame": "#cfcbcb",
      "tab_background_text": "#f6fca1"
    }
  },
  "version": "2.0",
  "name": "Summer in December",
  "manifest_version": 2,
  "description": "Summer spirit all the time......................................................................................................................................................\n\nTags: happy cheerful green chartreuse yellow spring bubbles bokeh light sun sunlight "
}