Examine source code of LDR

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "LDR",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center",
        "right center",
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(44, 134, 181, 0)",
      "toolbar_text": "rgb(252, 106, 182)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(252, 106, 182)",
      "toolbar_field": "rgba(53, 57, 71, 0)",
      "toolbar_field_text": "rgb(252, 106, 182)",
      "tab_line": "rgb(252, 106, 182)",
      "popup": "rgba(53, 57, 71, 0.75)",
      "popup_text": "rgb(252, 106, 182)",
      "tab_loading": "rgb(252, 106, 182)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2d24cc4-6085-467e-bf56-ace514b5dbbd}"
    }
  }
}