Examine source code of Wicker

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Wicker",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(138, 138, 138, 0.5)",
      "toolbar_text": "rgb(240, 255, 220)",
      "frame": "rgb(214, 214, 214)",
      "tab_background_text": "rgb(242, 225, 215)",
      "toolbar_field": "rgb(251, 255, 246)",
      "toolbar_field_text": "rgb(130, 47, 0)",
      "tab_line": "rgb(255, 153, 0)",
      "popup": "rgb(97, 66, 49)",
      "popup_text": "rgb(236, 183, 152)",
      "ntp_background": "rgb(97, 66, 49)",
      "ntp_text": "rgb(240, 255, 220)",
      "tab_loading": "rgb(255, 153, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{09e839d5-46a2-4dc8-bf3d-891f9b0133cf}"
    }
  }
}