Examine source code of Colorful Spring - Premium

{
  "manifest_version": 2,
  "name": "Colorful Spring - Premium",
  "version": "1.0.0",
  "description": "Sunset coral with golden hour warmth. Every tab feels like a spring evening.",
  "author": "Firefox Premium Themes",
  "theme": {
    "colors": {
      "frame": "#FF6F00",
      "tab_background_text": "#FFECB3",
      "toolbar": "#FF8F00",
      "toolbar_text": "#FFF3E0",
      "toolbar_field": "#E65100",
      "toolbar_field_text": "#FFE0B2",
      "toolbar_field_border": "#FFB300",
      "toolbar_field_focus": "#FF6F00",
      "tab_line": "#FF1744",
      "tab_selected": "#E65100",
      "popup": "#FF8F00",
      "popup_text": "#FFF3E0",
      "popup_border": "#FFB300",
      "sidebar": "#FF6F00",
      "sidebar_text": "#FFF3E0",
      "sidebar_border": "#FF8F00",
      "button_background_hover": "#FFA726",
      "button_background_active": "#FFB74D"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "colorful-spring-premium@firefox-themes.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}