Examine source code of Kit Nightdream

{
  "manifest_version": 2,
  "name": "Kit Nightdream",
  "version": "2.1.1",
  "description": "Rich violet and midnight-purple tones with vibrant orange accents, while Kit sleeps peacefully, bringing a cozy and playful charm to Firefox.",
  "author": "Illustrious Day",
  "browser_specific_settings": {
    "gecko": {
      "id": "{8e9e6f0c-ef21-40f8-8aaa-d39706b394d1}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/kit-nightdream.png"
      ]
    },
    "colors": {
      "frame": "#210340",
      "frame_inactive": "#210340",
      "tab_background_text": "#D8C9E5",
      "tab_selected": "#421474",
      "tab_text": "#FFF8FD",
      "tab_line": "#FF9A24",
      "tab_loading": "#FF9A24",
      "toolbar": "#260642",
      "toolbar_text": "#F3EAF7",
      "toolbar_field": "#3A1066",
      "toolbar_field_text": "#F5ECF8",
      "toolbar_field_border": "#5F2C88",
      "toolbar_field_focus": "#421474",
      "toolbar_field_text_focus": "#FFF8FD",
      "toolbar_field_border_focus": "#FF9A24",
      "toolbar_field_highlight": "#6D56B5",
      "toolbar_field_highlight_text": "#FFF8FD",
      "toolbar_top_separator": "#4F1B87",
      "toolbar_bottom_separator": "#3A1066",
      "toolbar_vertical_separator": "#54227D",
      "icons": "#FFB22A",
      "icons_attention": "#FF6F06",
      "button_background_hover": "rgba(255, 178, 42, 0.15)",
      "button_background_active": "rgba(79, 27, 135, 0.52)",
      "bookmark_text": "#E7DCEF",
      "popup": "#2A074A",
      "popup_text": "#F3EAF7",
      "popup_border": "#5F2C88",
      "popup_highlight": "#421474",
      "popup_highlight_text": "#FFF8FD",
      "sidebar": "#2A074A",
      "sidebar_text": "#F3EAF7",
      "sidebar_border": "#54227D",
      "sidebar_highlight": "#421474",
      "sidebar_highlight_text": "#FFF8FD",
      "ntp_background": "#210340",
      "ntp_card_background": "#32105B",
      "ntp_text": "#F7F0FA"
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ],
      "color_scheme": "system",
      "content_color_scheme": "system"
    }
  }
}