Examine source code of Bubu Panda Dark

{
  "manifest_version": 3,
  "version": "5.8.5",
  "name": "Electric Panda Dark",
  "author": "Vito Ferri",
  "developer": {
    "name": "Vito Ferri",
    "url": "https://github.com/VitoFe"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5d266402-4868-4f0c-b650-fd2d17c3a963}"
    }
  },
  "icons": {
    "32": "icons/icon-32.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "theme": {
    "properties": {
      "color_scheme": "dark",
      "content_color_scheme": "dark",
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "images": {
      "additional_backgrounds": [
        "images/bubu.png"
      ]
    },
    "colors": {
      "bookmark_text": "#FFFFFF",
      "frame": "#101010",
      "frame_inactive": "#101010",
      "ntp_background": "#21212110",
      "ntp_text": "#FFFFFF",
      "tab_text": "#FFFFFF",
      "tab_background_text": "#CCCCCC",
      "toolbar": "#21212110",
      "sidebar": "#101010",
      "sidebar_text": "#FFFFFF",
      "toolbar_field": "#101010",
      "toolbar_field_border": "#FFFFFF30",
      "toolbar_field_border_focus": "#FFFFFF",
      "toolbar_field_highlight": "#FFFFFF30",
      "toolbar_field_text": "#FFFFFF",
      "toolbar_top_separator": "#21212110",
      "tab_line": "#FFFFFF",
      "tab_loading": "#FFFFFF",
      "tab_selected": "#21212110",
      "popup": "#101010",
      "popup_highlight": "#FFFFFF",
      "popup_highlight_text": "#FFFFFF",
      "popup_text": "#FFFFFF",
      "button_background_active": "#FFFFFF30",
      "button_background_hover": "#FFFFFF20"
    }
  }
}