Examine source code of virgola

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "virgola",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 213, 140)",
      "toolbar_text": "rgb(169, 48, 0)",
      "frame": "rgb(75, 102, 117)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 253, 251)",
      "toolbar_field_text": "rgb(112, 11, 13)",
      "tab_line": "rgb(255, 115, 15)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(255, 185, 123)",
      "tab_loading": "rgb(255, 115, 15)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{654aefe3-dd6f-4776-ae84-835c11842d50}"
    }
  }
}