Examine source code of shrek theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "shrek theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(57, 51, 39)",
      "toolbar_text": "rgb(173, 158, 52)",
      "frame": "rgb(87, 73, 48)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(239, 211, 165)",
      "toolbar_field_text": "rgb(123, 127, 204)",
      "tab_line": "rgb(77, 122, 71)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(114, 183, 98)",
      "tab_loading": "rgb(77, 122, 71)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{167bd1a9-2d1c-4c67-9115-1aa277c29fd1}"
    }
  }
}