Examine source code of Brown parapet

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Brown parapet",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(91, 77, 67, 0.5)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(61, 33, 7)",
      "tab_background_text": "rgb(243, 235, 220)",
      "toolbar_field": "rgb(231, 222, 208)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(206, 116, 28)",
      "popup": "rgb(243, 235, 220)",
      "popup_text": "rgb(108, 0, 40)",
      "ntp_background": "rgb(61, 33, 7)",
      "ntp_text": "rgb(176, 176, 176)",
      "tab_loading": "rgb(206, 116, 28)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d5ad6567-22c6-4050-a44b-960ea625e0e2}"
    }
  }
}