Examine source code of esoteric red

{
  "name": "slick",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "hexagon-blender-4k-22-3840x2160.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 252, 252, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(250, 18, 18, 1)",
      "toolbar_field": "rgba(250, 0, 0, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{483ba929-4184-4003-89ba-e1ac6ac7d5fc}"
    }
  }
}