Examine source code of Detector's Spark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Zapped",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(20, 20, 20)",
      "toolbar_text": "rgb(255, 201, 29)",
      "frame": "rgb(12, 12, 12)",
      "tab_background_text": "rgb(140, 140, 140)",
      "toolbar_field": "rgb(38, 38, 38)",
      "toolbar_field_text": "rgb(242, 242, 242)",
      "tab_line": "rgb(255, 201, 29)",
      "popup": "rgb(47, 47, 47)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(128, 128, 128)",
      "button_background_hover": "rgb(47, 47, 47)",
      "icons": "rgb(242, 242, 242)",
      "ntp_background": "rgb(20, 20, 20)",
      "popup_border": "rgb(255, 201, 29)",
      "tab_loading": "rgb(255, 201, 29)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{26edd936-ead8-4871-a51c-4c65114a93ed}"
    }
  }
}