Examine source code of Leafwork PBR

{
  "manifest_version": 2,
  "name": "Leafwork PBR",
  "version": "1.0.0",
  "description": "Atmospheric earthy theme — wet stone, weathered wood, moss. Auto light/dark.",
  "author": "Leafwork",
  "homepage_url": "https://leafwork.io",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "leafwork-pbr@leafwork.io",
      "strict_min_version": "100.0"
    }
  },
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/header_light.png"
      ]
    },
    "properties": {
      "color_scheme": "auto",
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "frame": "#ede7d7",
      "frame_inactive": "#e5dec8",
      "toolbar": "#f5efe1",
      "toolbar_text": "#2a2722",
      "tab_background_text": "#5e574c",
      "tab_selected": "#f5efe1",
      "tab_text": "#2a2722",
      "tab_line": "#6c7d4f",
      "tab_loading": "#6c7d4f",
      "toolbar_top_separator": "#d8d0bd",
      "toolbar_bottom_separator": "#d8d0bd",
      "toolbar_vertical_separator": "#d8d0bd",
      "toolbar_field": "#e0d8c5",
      "toolbar_field_text": "#2a2722",
      "toolbar_field_focus": "#e0d8c5",
      "toolbar_field_text_focus": "#2a2722",
      "toolbar_field_border": "#bcb29c",
      "toolbar_field_border_focus": "#5d6e44",
      "toolbar_field_highlight": "#6c7d4f",
      "toolbar_field_highlight_text": "#fbf5e8",
      "icons": "#5e574c",
      "icons_attention": "#9c7c40",
      "button_background_hover": "#fbf5e8",
      "button_background_active": "#e5dec8",
      "popup": "#fefae9",
      "popup_text": "#2a2722",
      "popup_border": "#d8d0bd",
      "popup_highlight": "#6c7d4f",
      "popup_highlight_text": "#fbf5e8",
      "sidebar": "#f5efe1",
      "sidebar_text": "#2a2722",
      "sidebar_border": "#d8d0bd",
      "sidebar_highlight": "#6c7d4f",
      "sidebar_highlight_text": "#fbf5e8",
      "ntp_background": "#ede7d7",
      "ntp_card_background": "#f5efe1",
      "ntp_text": "#2a2722"
    }
  },
  "dark_theme": {
    "images": {
      "additional_backgrounds": [
        "images/header_dark.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "frame": "#1f1d1a",
      "frame_inactive": "#252320",
      "toolbar": "#2a2722",
      "toolbar_text": "#ebe5d7",
      "tab_background_text": "#aaa294",
      "tab_selected": "#2a2722",
      "tab_text": "#ebe5d7",
      "tab_line": "#7a8a5d",
      "tab_loading": "#7a8a5d",
      "toolbar_top_separator": "#3a352e",
      "toolbar_bottom_separator": "#3a352e",
      "toolbar_vertical_separator": "#3a352e",
      "toolbar_field": "#181613",
      "toolbar_field_text": "#ebe5d7",
      "toolbar_field_focus": "#181613",
      "toolbar_field_text_focus": "#ebe5d7",
      "toolbar_field_border": "#4e4942",
      "toolbar_field_border_focus": "#95a87a",
      "toolbar_field_highlight": "#7a8a5d",
      "toolbar_field_highlight_text": "#1f1d1a",
      "icons": "#aaa294",
      "icons_attention": "#c4a063",
      "button_background_hover": "#332f29",
      "button_background_active": "#3c3830",
      "popup": "#3c3830",
      "popup_text": "#ebe5d7",
      "popup_border": "#3a352e",
      "popup_highlight": "#7a8a5d",
      "popup_highlight_text": "#1f1d1a",
      "sidebar": "#2a2722",
      "sidebar_text": "#ebe5d7",
      "sidebar_border": "#3a352e",
      "sidebar_highlight": "#7a8a5d",
      "sidebar_highlight_text": "#1f1d1a",
      "ntp_background": "#1f1d1a",
      "ntp_card_background": "#2a2722",
      "ntp_text": "#ebe5d7"
    }
  }
}