Examine source code of Quiet Typeset Horizon

{
  "manifest_version": 2,
  "name": "Quiet Typeset Horizon",
  "version": "1.0",
  "description": "A calm composition inspired by typeset pages and distant horizons. Soft tonal balance and measured spacing create a steady, editorial browsing atmosphere.",
  "theme": {
    "colors": {
      "frame": "#20252a",
      "tab_background_text": "#e6eaed",
      "toolbar": "#2c3238",
      "toolbar_text": "#e6eaed",
      "toolbar_field": "#f4f6f7",
      "toolbar_field_text": "#20252a",
      "tab_line": "#748391"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{077925f3-c9e1-4152-9614-844b0308c9d2}"
    }
  }
}