Examine source code of Steel Blue Edition

{
  "manifest_version": 2,
  "name": "Steel Blue Edition",
  "version": "1.0",
  "description": "Steel Blue Edition – a modern abstract browser theme designed for everyday use in 2026.",
  "author": "Modern Theme Lab",
  "applications": {
    "gecko": {
      "id": "steel-blue-edition-2026@modernthemelab",
      "strict_min_version": "115.0"
    }
  },
  "theme": {
    "colors": {
      "frame": "#1e3a5f",
      "toolbar": "#1e3a5f",
      "toolbar_text": "#e5e7eb",
      "tab_text": "#111111",
      "popup": "#1e3a5f",
      "popup_text": "#111111"
    }
  }
}