Examine source code of Mars Desert

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Mars Desert",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-009-f069b97f439938a011297c84464f0df6.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 225, 9)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(250, 125, 30)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(198, 227, 138)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 225, 9)",
      "popup": "rgb(198, 227, 138)",
      "popup_text": "rgb(0, 0, 0)",
      "ntp_background": "rgb(0, 213, 255)",
      "popup_border": "rgba(0, 213, 255, 0)",
      "tab_selected": "rgb(255, 225, 9)",
      "toolbar_bottom_separator": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(255, 108, 105)",
      "toolbar_field_focus": "rgb(198, 227, 138)",
      "toolbar_top_separator": "rgb(255, 225, 9)",
      "tab_loading": "rgb(255, 225, 9)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f465548-8695-4d7c-988c-7bff13b51a1b}"
    }
  }
}