Examine source code of Roger Dean

{
  "theme": {
    "images": {
      "theme_frame": "RogerDeanMozilla.jpg"
    },
    "colors": {
      "frame": "#594f4f",
      "tab_background_text": "#c9afaf"
    }
  },
  "version": "2.0",
  "name": "Roger Dean",
  "manifest_version": 2,
  "description": "This is art by the artist Roger Dean, who did the album art for most of the Yes albums."
}