Examine source code of Druid Forest

{
  "manifest_version": 2,
  "name": "Druid Forest",
  "version": "1.0.0",
  "description": "A dark forest-green theme optimised for native vertical tabs. Clear active tab indicators in both expanded and collapsed modes.",
  "author": "Chris Funderburg",
  "developer": {
    "name": "Chris Funderburg",
    "url": "https://github.com/bocan"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "druid-forest@funderburg.me",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "theme": {
    "colors": {
      "frame": "#0e1a10",
      "frame_inactive": "#0a120b",
      "tab_background_text": "#c8d6c0",
      "tab_text": "#e0ecda",
      "tab_selected": "#1f3a22",
      "tab_line": "#5faa42",
      "tab_loading": "#5faa42",
      "toolbar": "#152218",
      "toolbar_text": "#d4e0cd",
      "toolbar_field": "#1a2d1e",
      "toolbar_field_text": "#e8f0e4",
      "toolbar_field_border": "#2a4a2f",
      "toolbar_field_focus": "#1e3523",
      "toolbar_field_border_focus": "#5faa42",
      "toolbar_field_highlight": "#5faa4233",
      "toolbar_field_highlight_text": "#ffffff",
      "toolbar_bottom_separator": "#2a4a2f",
      "toolbar_top_separator": "#2a4a2f",
      "toolbar_vertical_separator": "#2a4a2f55",
      "bookmark_text": "#c8d6c0",
      "sidebar": "#111e13",
      "sidebar_text": "#c8d6c0",
      "sidebar_highlight": "#2e5a33",
      "sidebar_highlight_text": "#e8f0e4",
      "sidebar_border": "#2a4a2f",
      "popup": "#152218",
      "popup_text": "#d4e0cd",
      "popup_border": "#2a4a2f",
      "popup_highlight": "#2e5a33",
      "popup_highlight_text": "#ffffff",
      "ntp_background": "#0e1a10",
      "ntp_text": "#c8d6c0",
      "ntp_card_background": "#152218",
      "icons": "#8ab880",
      "icons_attention": "#5faa42",
      "button_background_hover": "#2a4a2f66",
      "button_background_active": "#2a4a2f99"
    }
  }
}