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

  settings = {
    # --- New Tab Override ---
    "extensions.newtaboverride@agenedia.com.url" = url;
    "extensions.newtaboverride@agenedia.com.type" = 1; # URL mode

    # --- 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.page" = 1; # Always open the homepage
    "browser.startup.homepage" = url;
    "browser.newtab.url" = url; # Try to set newtab to homepage
    "browser.sessionstore.resume_from_crash" = false; # Always start fresh
    "browser.sessionstore.max_tabs_undo" = 0; # Disable undo close tab

    # --- 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 + Address Bar) --- */

    :root {
      --toolbox-transition-duration: 0.2s;
      --toolbox-transition-timing-function: ease;
    }

    #navigator-toolbox {
      position: fixed !important;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 9999 !important;
      transition: transform var(--toolbox-transition-duration) var(--toolbox-transition-timing-function) !important;
      transform: translateY(-100%) !important;
      opacity: 0 !important;
    }

    /* Reveal on hover */
    #navigator-toolbox:hover,
    #navigator-toolbox:focus-within {
      transform: translateY(0) !important;
      opacity: 1 !important;
    }

    /* Trigger zone at top of screen */
    #navigator-toolbox::after {
      content: "";
      position: absolute;
      top: 100%; /* Below the hidden toolbox */
      left: 0;
      width: 100%;
      height: 5px; /* Size of the trigger area */
      z-index: 10000 !important;
    }

    /* Remove native titlebar so it doesn't mess up height */
    #titlebar {
      appearance: none !important;
      margin-bottom: -10px !important; /* Pull things up if needed */
    }

    /* Ensure content starts at top of screen */
    #browser, #appcontent, tabbrowser, #tab-notification-deck {
      margin-top: 0 !important;
    }

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