Examine source code of Reading A Good Book

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Reading A Good Book",
  "manifest_version": 2,
  "description": "Open book on a white background. Reading a good book is like dreaming while awake."
}