Examine source code of Nanocules

{
  "theme": {
    "images": {
      "theme_frame": "smidgeons1600smaller-Copy.jpg"
    },
    "colors": {
      "frame": "#00d0ff",
      "tab_background_text": "#fafafa"
    }
  },
  "version": "2.0",
  "name": "Nanocules",
  "manifest_version": 2,
  "description": "based on Smidgeons by digital blasphemy"
}