Examine source code of The Other Dracula

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "The Other Dracula",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(40, 42, 54)",
      "toolbar_text": "rgb(248, 248, 243)",
      "frame": "rgb(29, 30, 38)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(65, 69, 86)",
      "toolbar_field_text": "rgb(248, 248, 243)",
      "tab_line": "rgb(255, 128, 191)",
      "popup": "rgb(65, 69, 86)",
      "popup_text": "rgb(248, 248, 243)",
      "button_background_active": "rgb(108, 115, 147)",
      "button_background_hover": "rgb(65, 69, 86)",
      "frame_inactive": "rgb(40, 42, 54)",
      "icons_attention": "rgb(128, 255, 234)",
      "icons": "rgb(255, 128, 191)",
      "ntp_text": "rgb(248, 248, 243)",
      "popup_border": "rgb(40, 42, 54)",
      "sidebar_border": "rgb(29, 30, 38)",
      "sidebar_highlight_text": "rgb(29, 30, 38)",
      "sidebar_highlight": "rgb(128, 255, 234)",
      "sidebar_text": "rgb(248, 248, 243)",
      "sidebar": "rgb(40, 42, 54)",
      "tab_background_separator": "rgb(40, 42, 54)",
      "tab_selected": "rgb(65, 69, 86)",
      "tab_text": "rgb(248, 248, 243)",
      "toolbar_bottom_separator": "rgb(65, 69, 86)",
      "toolbar_field_border_focus": "rgb(108, 115, 147)",
      "toolbar_field_border": "rgb(40, 42, 54)",
      "toolbar_field_focus": "rgb(65, 69, 86)",
      "toolbar_field_highlight_text": "rgb(248, 248, 243)",
      "toolbar_field_highlight": "rgb(108, 115, 147)",
      "toolbar_field_separator": "rgb(40, 42, 54)",
      "toolbar_field_text_focus": "rgb(248, 248, 243)",
      "toolbar_top_separator": "rgb(65, 69, 86)",
      "toolbar_vertical_separator": "rgb(108, 115, 147)",
      "tab_loading": "rgb(255, 128, 191)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{910b485c-5bbc-44df-9e6b-b375978465d2}"
    }
  }
}