{
  lib,
  pkgs,
  cfg,
}: let
  millisecond = 1;
  second = 1000 * millisecond;

  wordlist =
    pkgs.runCommandNoCCLocal "wordlist" {
      nativeBuildInputs = [pkgs.python3];
    }
    ''
      python ${
        pkgs.writeText "normalize-words"
        # python
        ''
          import string
          import os

          # Perform qutebrowser's normalizations, to reduce our dependency closure.
          # See <//qutebrowser/qutebrowser/browser/hints.py> for them.
          with open("${pkgs.scowl}/share/dict/words.txt", encoding = "latin1") as wordfile:
            alphabet = set(string.ascii_lowercase)
            hints = set()
            lines = (line.rstrip().lower() for line in wordfile)
            for word in lines:
                if len(word) > 4:
                    # we don't need words longer than 4
                    continue
                if set(word) - alphabet:
                    # contains none-alphabetic chars
                    continue
                for i in range(len(word)):
                    # remove all prefixes of this word
                    hints.discard(word[:i + 1])
                hints.add(word)

          with open(os.environ["out"], "w") as out:
            for word in hints:
              out.write(word)
              out.write("\n")
        ''
      }
    '';
in {
  aliases = {
    q = "close";
    qa = "quit";
    w = "session-save";
    wq = "quit --save";
    wqa = "quit --save";
    read = "spawn --userscript readability";
  };

  auto_save = {
    interval = 10 * second;
    session = true; # Safe/restore the session
  };

  backend = "webengine";

  bindings = {
    default = {}; # Disable the default key bindings

    commands = import ./keybindings.nix {inherit cfg lib;};

    key_mappings = {
      "<Ctrl-6>" = "<Ctrl-^>";
      "<Ctrl-Enter>" = "<Ctrl-Return>";
      "<Ctrl-I>" = "<Tab>";
      "<Ctrl-J>" = "<Return>";
      "<Ctrl-M>" = "<Return>";
      "<Ctrl-[>" = "<Escape>";
      "<Enter>" = "<Return>";
      "<Shift-Enter>" = "<Return>";
      "<Shift-Return>" = "<Return>";
    };
  };

  changelog_after_upgrade = "minor";

  fonts = {};
  colors = {
    # TODO(@bpeetz): Use a nord color scheme (or stylix). <2025-05-31>

    # Make things readable.
    messages.error.fg = "black";
    completion.match.fg = "black";

    webpage = {
      darkmode = {
        enabled = true;
        algorithm = "lightness-cielab";
        policy = {
          images = "smart";
          page = "smart";
        };
        threshold = {
          background = 0; # 0 -> always
          foreground = 256; # 256 -> always
        };
      };
      preferred_color_scheme = "auto";
    };
  };

  completion = {
    cmd_history_max_items = -1; # No limit.
    delay = 0; # delay before updating completions in milliseconds.
    favorite_paths = [];
    height = "50%";
    min_chars = 1;
    open_categories = ["searchengines" "quickmarks" "bookmarks" "history" "filesystem"];

    quick = true; # Select, when only one left.

    scrollbar = {
      padding = 0;
      width = 0;
    };

    show = "auto"; # Only show, when selected

    shrink = true;

    use_best_match = false;
    web_history = {
      exclude = [];
      max_items = -1; # unlimited.
    };
  };

  confirm_quit = [
    "downloads"
  ];

  content = {
    autoplay = false;

    blocking = {
      enabled = true;

      # Sources for brave's adblocker
      adblock = {
        lists = [
          "https://easylist.to/easylist/easylist.txt"
          "https://easylist.to/easylist/easyprivacy.txt"
        ];
      };

      # Sources for the (simpler) /etc/hosts based one.
      hosts = {
        block_subdomains = true;
        lists = [];
      };

      method = "adblock"; # Only brave's
      whitelist = [];
    };

    # Allow websites to read canvas elements.
    canvas_reading = true;

    cookies = {
      store = true;
      accept = "no-3rdparty";
    };

    default_encoding = "utf-8";

    dns_prefetch = true;

    fullscreen = {
      # Fullscreen is limited to the browser window.
      window = true;
      overlay_timeout = 3 * second;
    };

    headers = {
      accept_language = "en-CA,sv,en;q=0.9";
      custom = {};
      do_not_track = true;
      referer = "same-domain";
      user_agent = "Mozilla/5.0 ({os_info}) AppleWebKit/{webkit_version} (KHTML, like Gecko) {upstream_browser_key}/{upstream_browser_version_short} Safari/{webkit_version}";
    };

    hyperlink_auditing = false;

    # Auto-load images.
    images = true;

    javascript = {
      enabled = true;

      can_open_tabs_automatically = false;
      alert = true;
      clipboard = "ask";
      legacy_touch_events = "never";

      log = {
        error = "debug";
        warning = "debug";
        info = "debug";
        unknown = "debug";
      };

      modal_dialog = false;
      prompt = true;
    };

    local_content_can_access_file_urls = true;
    local_content_can_access_remote_urls = false;

    local_storage = true;

    desktop_capture = "ask";
    geolocation = "ask";
    persistent_storage = "ask";
    mouse_lock = "ask";
    register_protocol_handler = "ask";
    media = {
      audio_capture = "ask";
      audio_video_capture = "ask";
      video_capture = "ask";
    };

    mute = false;

    notifications = {
      # TODO(@bpeetz): I might change that. <2025-05-31>
      enabled = true;

      presenter = "libnotify";
      show_origin = true;
    };

    pdfjs = false;

    # TODO(@bpeetz): What are “plugins in Web pages”? <2025-05-31>
    plugins = false;

    prefers_reduced_motion = false;
    print_element_backgrounds = true;
    private_browsing = false;
    proxy = "system";

    site_specific_quirks = {
      enabled = true;
      skip = [];
    };

    tls = {
      certificate_errors = "ask";
    };

    unknown_url_scheme_policy = "allow-from-user-interaction";
    user_stylesheets = [];

    webgl = true;

    webrtc_ip_handling_policy = "all-interfaces";
    xss_auditing = false;
  };

  downloads = {
    location = {
      # Use OS default.
      directory = null;
      prompt = true;
      remember = true;
      suggestion = "path";
    };

    # TODO(@bpeetz): I might want to set that. <2025-05-31>
    open_dispatcher = null;

    position = "top";
    prevent_mixed_content = true;

    # Never remove downloads without my intervention.
    remove_finished = -1;
  };

  editor = {
    command = [
      "${lib.getExe pkgs.alacritty}"
      "--title"
      "floating please"
      "--command"
      "nvim"
      "-c"
      "normal {line}G{column0}|"
      "{file}"
    ];
    encoding = "utf-8";
    remove_file = true;
  };

  fileselect = {
    handler = "default";
  };

  hints = {
    auto_follow = "unique-match";
    auto_follow_timeout = 0;

    chars = "asdfghjkl";
    dictionary = "${wordlist}";

    hide_unmatched_rapid_hints = true;
    leave_on_load = false;

    min_chars = 1;
    next_regexes = ["\\bnext\\b" "\\bmore\\b" "\\bnewer\\b" "\\b[>→≫]\\b" "\\b(>>|»)\\b" "\\bcontinue\\b"];
    prev_regexes = ["\\bprev(ious)?\\b" "\\bback\\b" "\\bolder\\b" "\\b[<←≪]\\b" "\\b(<<|«)\\b"];

    scatter = true;
    uppercase = false;
    mode = "word";
  };

  input = {
    escape_quits_reporter = false;
    forward_unbound_keys = "auto";

    insert_mode = {
      auto_enter = true;
      auto_leave = true;
      auto_load = false;
      leave_on_load = true;
      plugins = false;
    };

    links_included_in_focus_chain = true;
    match_counts = true;

    media_keys = true;

    mode_override = null;

    mouse = {
      back_forward_buttons = true;
      rocker_gestures = false;
    };

    partial_timeout = 0;
    spatial_navigation = false;
  };

  keyhint = {
    blacklist = [];
    delay = 250 * millisecond;
  };

  logging = {
    level = {
      console = "info";
      ram = "debug";
    };
  };

  messages = {
    timeout = 3 * second;
  };

  new_instance_open_target = "tab";
  new_instance_open_target_window = "last-focused";

  prompt = {
    filebrowser = true;
  };

  qt = {
    args = [];

    chromium = {
      experimental_web_platform_features = "auto";
      low_end_device_mode = "auto";
      process_model = "process-per-site-instance";
      sandboxing = "enable-all";
    };

    environ = {};
    force_platform = null;
    force_platformtheme = null;
    force_software_rendering = "none";

    highdpi = true;

    workarounds = {
      disable_accelerated_2d_canvas = "auto";
      disable_hangouts_extension = false;
      locale = false;
      remove_service_workers = false;
    };
  };

  scrolling = {
    bar = "never";
    smooth = false;
  };

  search = {
    ignore_case = "smart";
    incremental = true;
    wrap = true;
    wrap_messages = true;
  };

  session = {
    default_name = null;
    # TODO(@bpeetz): See https://github.com/qutebrowser/qutebrowser/issues/67 <2025-06-04>
    lazy_restore = false;
  };

  spellcheck = {
    # TODO(@bpeetz): Installing them (reproducibly) is simply not worth the hassle, as
    # qutebrowser already provides quick access to an editor. <2025-06-04>
    # languages = ["en-GB" "sv-SE" "de-DE"];
  };

  statusbar = {
    padding = {
      bottom = 5;
      left = 5;
      right = 5;
      top = 5;
    };

    position = "top";
    show = "always";
    widgets = ["keypress" "search_match" "url" "scroll" "history" "tabs" "progress"];
  };

  tabs = {
    background = true;
    close_mouse_button = "middle";
    close_mouse_button_on_bar = "new-tab";

    favicons = {
      scale = 1;
      show = "always";
    };

    focus_stack_size = 10;

    last_close = "default-page";

    max_width = -1;
    min_width = -1;

    mode_on_change = "normal";

    mousewheel_switching = true;

    new_position = {
      related = "next";
      unrelated = "next";
      stacking = true;
    };

    pinned = {
      frozen = true;
      shrink = true;
    };

    position = "top";

    select_on_remove = "last-used";

    show = "multiple";
    show_switching_delay = 2 * second;

    tabs_are_windows = false;
    title = {
      alignment = "center";
      elide = "middle";
      format = "{audio}{index}: {current_title}";
      format_pinned = "{index}";
    };

    tooltips = true;
    undo_stack_size = 100;
    width = "15%";
    wrap = true;
  };

  url = {
    auto_search = "naive";
    default_page = "qute://start";
    incdec_segments = ["path" "query"];

    open_base_url = false; # Of search engine.
    searchengines = rec {
      DEFAULT = leta;

      leta = "https://leta.mullvad.net/search?q={}";
      "@ls" = leta;

      # NIX
      "@np" = "https://search.nixos.org/packages?type=packages&query={}"; # Nix packages

      "@ng" = "https://noogle.dev/q?term={}"; # Nix functions

      "@no" = "https://search.nixos.org/options?type=options&query={}"; # NixOS options
      "@nh" = "https://home-manager-options.extranix.com/?query={}&release=master"; # Home-Manager options

      "@ni" = "https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+{}"; # Nixpkgs issues
      "@nr" = "https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+{}"; # Nixpkgs pull requests

      "@nt" = "https://nixpk.gs/pr-tracker.html?pr={}"; # Nixpkgs pull requests tracker
      "@nw" = "https://wiki.nixos.org/w/index.php?search={}"; # NixOS Wiki

      # RUST
      "@rs" = "https://doc.rust-lang.org/std/?search={}"; # Rust std
      "@rt" = "https://docs.rs/tokio/latest/tokio/index.html?search={}"; # Rust tokio

      # OTHER
      "@gs" = "https://scholar.google.com/scholar?hl=en&q={}"; # Google Scholar
      "@wp" = "https://en.wikipedia.org/wiki/{}"; # Wikipedia
      "@aw" = "https://wiki.archlinux.org/index.php?search={}"; # Arch Wiki
    };

    start_pages = ["qute://start"];
    yank_ignored_parameters = ["ref" "utm_source" "utm_medium" "utm_campaign" "utm_term" "utm_content" "utm_name"];
  };

  window = {
    hide_decoration = true;
    title_format = "{perc}{current_title}{title_sep}qutebrowser";
    transparent = false;
  };
}