Examine source code of Scorched Planet

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Scorched Planet",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(56, 21, 0, 0.49)",
      "toolbar_text": "rgb(255, 108, 8)",
      "frame": "rgb(75, 17, 0)",
      "tab_background_text": "rgb(255, 185, 125)",
      "toolbar_field": "rgba(64, 29, 0, 0.63)",
      "toolbar_field_text": "rgb(255, 176, 109)",
      "tab_line": "rgb(255, 96, 0)",
      "popup": "rgba(72, 31, 0, 0.94)",
      "popup_text": "rgb(255, 141, 98)",
      "tab_loading": "rgb(255, 96, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a9d8e510-61e2-45b4-a927-0ee88ccba983}"
    }
  }
}