Examine source code of Commodore 64 Christmas

{
  "name": "Commodore 64 Christmas",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Commodore 64 Christmas.png"
    },
    "colors": {
      "frame": "rgba(137, 64, 54, 1)",
      "tab_background_text": "rgba(104, 169, 65, 1)",
      "toolbar": "rgba(104, 169, 65, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(172, 234, 136, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a846baa5-cfcd-445f-b128-3dcf8c5a1c26}"
    }
  }
}