Examine source code of dothevoka

{
  "theme": {
    "images": {
      "theme_frame": "firefoxfractalshards.jpg"
    },
    "colors": {
      "frame": "#1a0019",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "dothevoka",
  "manifest_version": 2,
  "description": "Very dark (nearly black) purple with random splashes of vivid fuchsia, pink, orchid, lavender, blue and other shades. Dark. Colorful."
}