Examine source code of Psychedelic Circles

{
  "theme": {
    "images": {
      "theme_frame": "cercles1.jpg"
    },
    "colors": {
      "frame": "#dc1bf2",
      "tab_background_text": "#dc1bf2"
    }
  },
  "version": "2.0",
  "name": "Psychedelic Circles",
  "manifest_version": 2,
  "description": "circles / cercles"
}