Examine source code of glacial

{
  "theme": {
    "images": {
      "theme_frame": "glacial.jpg"
    },
    "colors": {
      "frame": "#f7f7fa",
      "tab_background_text": "#0511f2"
    }
  },
  "version": "2.0",
  "name": "glacial",
  "manifest_version": 2,
  "description": "Glacier near El Calafate in Argentina"
}