Examine source code of Mountain Range

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Mountain Range",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(86, 86, 116)",
      "toolbar_text": "rgb(223, 210, 197)",
      "frame": "rgb(6, 70, 151)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(223, 210, 197)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(239, 255, 0)",
      "popup": "rgb(58, 96, 145)",
      "popup_text": "rgb(0, 0, 0)",
      "sidebar": "rgb(150, 89, 89)",
      "tab_background_separator": "rgb(255, 0, 0)",
      "tab_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(239, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2acba995-dd22-45ed-a6e6-83a34b12fdb6}"
    }
  }
}