Examine source code of Pink Halloween Summerween

{
  "name": "Pink Halloween Summerween",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "summerweenfirefox.jpg"
    },
    "colors": {
      "frame": "rgba(255, 204, 243, 0.69)",
      "tab_background_text": "rgba(255, 138, 191, 1)",
      "toolbar": "rgba(255, 199, 231, 0.34)",
      "bookmark_text": "rgba(255, 33, 126, 1)",
      "toolbar_field": "rgba(255, 242, 247, 0.5)",
      "toolbar_field_text": "rgba(255, 33, 133, 1)",
      "tab_line": "rgba(255, 224, 238, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{466cea9b-12b9-43f0-adde-bcdbcc78ee24}"
    }
  }
}