Examine source code of mirage canyon

{
  "theme": {
    "images": {
      "theme_frame": "miragecanyon.jpg"
    },
    "colors": {
      "frame": "#6fb9f2",
      "tab_background_text": "#fcf7f7"
    }
  },
  "version": "2.0",
  "name": "mirage canyon",
  "manifest_version": 2,
  "description": "cartoon canyon with river"
}