Examine source code of Glimmering Christmas

{
  "name": "Glimmering Christmas",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Glimmering Christmas.png"
    },
    "colors": {
      "frame": "rgba(178, 39, 50, 1)",
      "tab_background_text": "rgba(189, 167, 116, 1)",
      "toolbar": "rgba(189, 167, 116, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(178, 39, 50, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a188289e-9ea7-4d95-84ca-b1c2436b52f8}"
    }
  }
}