Examine source code of Nerdbar

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nerd",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(27, 40, 45)",
      "toolbar_text": "rgb(140, 140, 140)",
      "frame": "rgb(23, 23, 23)",
      "tab_background_text": "rgb(205, 46, 98)",
      "toolbar_field": "rgb(23, 23, 23)",
      "toolbar_field_text": "rgba(234, 255, 0, 0.44)",
      "tab_line": "rgba(234, 255, 0, 0.44)",
      "popup": "rgb(27, 40, 45)",
      "popup_text": "rgb(140, 140, 140)",
      "button_background_active": "rgba(0, 0, 0, 0.44)",
      "button_background_hover": "rgba(205, 46, 98, 0.25)",
      "frame_inactive": "rgba(205, 46, 98, 0.17)",
      "icons": "rgba(205, 46, 98, 0.71)",
      "ntp_background": "rgba(23, 23, 23, 0.88)",
      "ntp_text": "rgba(232, 252, 5, 0)",
      "popup_border": "rgba(205, 48, 126, 0)",
      "sidebar_border": "rgb(47, 43, 45)",
      "sidebar_highlight_text": "rgba(232, 252, 5, 0.52)",
      "sidebar_highlight": "rgb(27, 40, 45)",
      "sidebar_text": "rgb(140, 140, 140)",
      "sidebar": "rgb(27, 40, 45)",
      "tab_background_separator": "rgba(232, 252, 5, 0)",
      "tab_selected": "rgba(209, 49, 129, 0)",
      "tab_text": "rgba(234, 255, 0, 0.44)",
      "toolbar_bottom_separator": "rgb(23, 23, 23)",
      "toolbar_field_border": "rgba(205, 46, 98, 0)",
      "toolbar_field_separator": "rgba(23, 23, 23, 0.88)",
      "toolbar_top_separator": "rgb(7, 4, 4)",
      "toolbar_vertical_separator": "rgba(140, 140, 140, 0.26)",
      "tab_loading": "rgba(234, 255, 0, 0.44)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fda36943-c694-481c-8b45-1e82e0780d6c}"
    }
  }
}