Examine source code of Starry night sky lofi

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Starry night sky lofi",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(19, 56, 95)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(255, 255, 255, 0.44)",
      "toolbar_field_text": "rgb(231, 43, 126)",
      "tab_line": "rgb(231, 43, 126)",
      "popup": "rgba(19, 56, 95, 0.85)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgba(231, 43, 126, 0.75)",
      "button_background_hover": "rgba(19, 56, 95, 0.62)",
      "icons_attention": "rgb(231, 43, 126)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(9, 26, 44)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgba(255, 255, 255, 0)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgba(231, 43, 126, 0.82)",
      "tab_background_separator": "rgb(255, 255, 255)",
      "tab_loading": "rgb(231, 43, 126)",
      "tab_selected": "rgba(19, 56, 95, 0.71)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgba(255, 255, 255, 0.54)",
      "toolbar_field_border": "rgba(255, 255, 255, 0)",
      "toolbar_field_focus": "rgba(255, 255, 255, 0)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(231, 43, 126)",
      "toolbar_top_separator": "rgba(255, 255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7d12fd74-caa8-4040-be53-c181ac7beb97}"
    }
  }
}