Examine source code of Oh Dear

{
  "theme": {
    "images": {
      "theme_frame": "dearheader.jpg"
    },
    "colors": {
      "frame": "#f4f4f7",
      "tab_background_text": "#0ceef2"
    }
  },
  "version": "2.0",
  "name": "Oh Dear",
  "manifest_version": 2,
  "description": "Photo of deer at South Magnetawan River Ontario Canada"
}