Examine source code of Treuchtlingen Dark

{
  "name": "Treuchtlingen Dunkel",
  "manifest_version": 2,
  "version": "6.0",
  "theme": {
    "images": {
      "theme_frame": "background.svg"
    },
    "colors": {
      "icons_attention": "#b4822d",
      "toolbar_field_border_focus": "#559b73",
      "frame": "#222222",
      "tab_background_text": "#ffffff",
      "toolbar": "#00000088",
      "toolbar_field": "#333333",
      "toolbar_field_text": "#cccccc",
      "toolbar_field_text_focus": "#ffffff",
      "tab_line": "#b4822d"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tr-dark@treuchtlingen.de",
      "strict_min_version": "91.0"
    }
  }
}