Examine source code of Christmas Sloths

{
  "name": "Christmas Sloths",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Christmas Sloths.png"
    },
    "colors": {
      "frame": "rgba(3, 24, 29, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(218, 232, 229, 0.64)",
      "bookmark_text": "rgba(54, 69, 59, 1)",
      "toolbar_field": "rgba(112, 133, 119, 0.62)",
      "toolbar_field_text": "rgba(54, 69, 59, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{115dd5e4-577c-4b39-8b98-b8c3914f60f1}"
    }
  }
}