Examine source code of Dell Frog

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#f2f9fa",
      "tab_background_text": "#bac"
    }
  },
  "version": "2.0",
  "name": "Dell Frog",
  "manifest_version": 2,
  "description": "I created this as I'm a fan of DELL computers."
}