Examine source code of KDE Monochrome

{
  "name": "KDE Monochrome",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled.png"
    },
    "colors": {
      "frame": "rgba(28, 28, 28, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(48, 48, 48, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(28, 28, 28, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(145, 145, 145, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{69978ffa-59fc-41b8-aa50-ddf4fc29cf1e}"
    }
  }
}