Examine source code of Rose - Premium

{
  "manifest_version": 2,
  "name": "Rose - Premium",
  "version": "1.0.0",
  "description": "Elegant rose blush with champagne gold. Sophisticated femininity meets modern design.",
  "author": "Firefox Premium Themes",
  "theme": {
    "colors": {
      "frame": "#F48FB1",
      "tab_background_text": "#880E4F",
      "toolbar": "#FCE4EC",
      "toolbar_text": "#880E4F",
      "toolbar_field": "#F8BBD0",
      "toolbar_field_text": "#AD1457",
      "toolbar_field_border": "#F06292",
      "toolbar_field_focus": "#FFEEF4",
      "tab_line": "#FFD700",
      "tab_selected": "#FFEEF4",
      "popup": "#FCE4EC",
      "popup_text": "#880E4F",
      "popup_border": "#F48FB1",
      "sidebar": "#FFFAFD",
      "sidebar_text": "#880E4F",
      "sidebar_border": "#F8BBD0",
      "button_background_hover": "#F8BBD0",
      "button_background_active": "#F48FB1"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "rose-premium@firefox-themes.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}