Examine source code of Universe

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Universe",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(235, 235, 235)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(101, 101, 101)",
      "toolbar_field": "rgb(32, 32, 32)",
      "toolbar_field_text": "rgb(91, 201, 73)",
      "tab_line": "rgb(255, 227, 0)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(0, 255, 0)",
      "tab_loading": "rgb(255, 227, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{80e26cdc-c8a1-49d3-bf25-31a2529dc162}"
    }
  }
}