Examine source code of Snow Scene by MaDonna

{
  "name": "Snow Scene by MaDonna",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "SnowScene2H.jpg"
    },
    "colors": {
      "frame": "rgba(196, 205, 255, 1)",
      "tab_background_text": "rgba(2, 2, 51, 1)",
      "toolbar": "rgba(196, 203, 255, 0)",
      "bookmark_text": "rgba(2, 2, 46, 1)",
      "toolbar_field": "rgba(196, 203, 255, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0488b0e3-cf3b-4461-b37c-3e6485dda9c4}"
    }
  }
}