{
  pkgs,
  myConfig,
  ...
}: {
  id = 1;
  name = "YouTube";
  search.force = true;
  search.default = "ddg";
  extensions.force = true;
  extensions.packages = with pkgs.nur.repos.rycee.firefox-addons; [
    ublock-origin
    bitwarden
    tridactyl
  ];

  settings = {
    # --- Privacy & Hardening ---
    "browser.contentblocking.category" = "strict";
    "privacy.trackingprotection.enabled" = true;
    "privacy.resistFingerprinting" = true; # Note: Spoofs timezone and caps FPS to 60
    "geo.enabled" = false;
    "media.peerconnection.enabled" = false; # Prevents WebRTC IP leaks
    "network.dns.disablePrefetch" = true;
    "network.prefetch-next" = false;

    # --- NixOS / Hyprland Integration ---
    "widget.use-xdg-desktop-portal.file-picker" = 1; # Use native file picker

    # --- UI & Behavior ---
    "browser.compactmode.show" = true;
    "browser.tabs.closeWindowWithLastTab" = false;
    "extensions.pocket.enabled" = false;
    "extensions.screenshots.disabled" = true;
    "browser.topsites.contile.enabled" = false;
    "browser.formfill.enable" = false;
    "browser.search.suggest.enabled" = false;
    "browser.search.suggest.enabled.private" = false;
    "browser.urlbar.suggest.searches" = false;
    "browser.urlbar.showSearchSuggestionsFirst" = false;
    "browser.newtabpage.activity-stream.feeds.section.topstories" = false;
    "browser.newtabpage.activity-stream.feeds.snippets" = false;
    "browser.newtabpage.activity-stream.section.highlights.includePocket" = false;
    "browser.newtabpage.activity-stream.section.highlights.includeBookmarks" = false;
    "browser.newtabpage.activity-stream.section.highlights.includeDownloads" = false;
    "browser.newtabpage.activity-stream.section.highlights.includeVisited" = false;
    "browser.newtabpage.activity-stream.showSponsored" = false;
    "browser.newtabpage.activity-stream.system.showSponsored" = false;
    "browser.newtabpage.activity-stream.showSponsoredTopSites" = false;
    "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
    "extensions.autoDisableScopes" = 0; # Enable extensions by default

    # --- Homepage & Navigation ---
    "browser.startup.homepage" = "https://youtube.com";
    "browser.newtabpage.pinned" = myConfig.firefox.newtabpage;

    # --- DNS over HTTPS (Quad9) ---
    "network.trr.mode" = 2; # Use DoH with system fallback
    "network.trr.uri" = "https://dns.quad9.net/dns-query";
  };

  userChrome = ''
    /* --- Floating Autohide Toolbox (Tabs Only) --- */

    /* Take toolbox out of the document flow so web content is 100% height */
    #navigator-toolbox {
      position: fixed !important;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 9999 !important;
      background-color: var(--toolbar-bgcolor, #1c1b22) !important;
      
      /* Start hidden */
      transform: translateY(-100%) !important;
      opacity: 0 !important;
      transition: transform 0.2s ease, opacity 0.2s ease !important;
    }

    /* Trigger zone */
    #navigator-toolbox::after {
      content: "";
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      height: 10px;
      z-index: 10000 !important;
    }

    /* Reveal when hovering */
    #navigator-toolbox:hover {
      transform: translateY(0) !important;
      opacity: 1 !important;
    }

    /* --- Hide specific bars --- */

    /* Hide Navigation Bar (Address Bar) COMPLETELY */
    #nav-bar {
      visibility: collapse !important;
      height: 0px !important;
      min-height: 0px !important;
      padding: 0 !important;
      margin: 0 !important;
    }

    /* Hide Bookmarks Toolbar */
    #PersonalToolbar { visibility: collapse !important; }

    /* Hide Titlebar */
    #titlebar { appearance: none !important; }

    /* Ensure TabsToolbar looks okay on its own */
    #TabsToolbar {
      border: none !important;
      background: transparent !important;
    }
  '';
}