Examine source code of Alduin

{
  "name": "Alduin",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "solid-color-image.png"
    },
    "colors": {
      "frame": "rgba(28, 28, 28, 1)",
      "tab_background_text": "rgba(135, 135, 135, 1)",
      "toolbar": "rgba(28, 28, 28, 1)",
      "bookmark_text": "rgba(223, 223, 175, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(223, 223, 175, 1)",
      "tab_line": "rgba(175, 95, 95, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b19e9d5c-962a-4842-a98e-245a725890d1}"
    }
  }
}