Examine source code of gotogoto

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "gotogoto",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(8, 0, 0, 0)",
      "toolbar_text": "rgb(0, 6, 9)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(7, 0, 2)",
      "toolbar_field": "rgba(255, 255, 255, 0.13)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgba(0, 0, 0, 0.69)",
      "popup": "rgba(0, 0, 0, 0.43)",
      "popup_text": "rgb(203, 199, 49)",
      "button_background_active": "rgba(34, 25, 77, 0.86)",
      "icons": "rgba(34, 25, 77, 0.81)",
      "sidebar_text": "rgba(65, 52, 128, 0.86)",
      "tab_loading": "rgba(0, 0, 0, 0.69)"
    }
  }
}