Examine source code of WiggleWiggle

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "WiggleWiggle",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-013-06591d4ad28ab7b9ee90f62f81d6b505.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(237, 202, 23)",
      "toolbar_text": "rgb(255, 136, 118)",
      "frame": "rgb(195, 239, 0)",
      "tab_background_text": "rgb(255, 100, 156)",
      "toolbar_field": "rgb(195, 239, 0)",
      "toolbar_field_text": "rgb(255, 100, 156)",
      "tab_line": "rgb(255, 100, 156)",
      "popup": "rgb(237, 202, 23)",
      "popup_text": "rgb(255, 136, 118)",
      "tab_loading": "rgb(255, 100, 156)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6ac42e11-c24a-4b07-98ec-dc54c2ef8c18}"
    }
  }
}