Examine source code of hythadelica

{
  "theme": {
    "images": {
      "theme_frame": "firefoxbigstripe.jpg"
    },
    "colors": {
      "frame": "#1f296c",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "hythadelica",
  "manifest_version": 2,
  "description": "Multicolor psychedelic hues of blue, green, aqua, red and purple. Bold, colorful rainbow tones."
}