{ config, pkgs, lib, ... }:
{
  users.users.yoda = {
    packages = with pkgs; [
      firefox # Web browser
    ];
  };

  # Touch input with Firefox under X11.
  environment.sessionVariables = lib.mkIf (! config.services.xserver.displayManager.gdm.wayland) {
    MOZ_USE_XINPUT2 = "1";
  };

  # Required for dconf.settings
  programs.dconf.enable = true;

  home-manager.users.yoda = { osConfig, config, pkgs, ... }: {
    dconf.settings = {
      "org/gnome/shell" = {
        favorite-apps = ["firefox.desktop"];
      };
    };

    programs.firefox = {
      enable = true;
      profiles.default = {
        isDefault = true;
        # https://wiki.archlinux.org/title/Firefox/Privacy
        settings = {
          # Don't execute JavaScript from PDF files.
          "pdfjs.enableScripting" = false;
          # "Do Not Track" header.
          "privacy.donottrackheader.enabled" = true;
          # HTTPS-only mode in all windows.
          # https://www.privacy-handbuch.de/handbuch_21l.htm
          "dom.security.https_only_mode" = true;
          # Don't ask to save passwords/logins.
          "signon.rememberSignons" = false;

          # Global Privacy Control.
          # The extension "Privacy Badger" enables this for us as well.
          # https://blog.mozilla.org/netpolicy/2021/10/28/implementing-global-privacy-control/
          #"privacy.globalprivacycontrol.enabled" = true;
          #"privacy.globalprivacycontrol.functionality.enabled" = true;

          # https://wiki.archlinux.org/title/Firefox/Privacy#Tracking_protection
          "privacy.trackingprotection.enabled" = true;
          #"privacy.trackingprotection.emailtracking.enabled" = true;
          #"privacy.trackingprotection.socialtracking.enabled" = true;

          # https://wiki.archlinux.org/title/Firefox/Privacy#Anti-fingerprinting
          "privacy.resistFingerprinting" = true;
          # https://wiki.archlinux.org/title/Firefox/Privacy#First_party_isolation
          "privacy.firstparty.isolate" = true;

          # https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
          # The attribute would be useful for letting websites track visitors' clicks.
          "browser.send_pings" = false;

          # https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
          # Disable preloading of autocomplete URLs.
          # Firefox preloads URLs that autocomplete when a user types into the address bar,
          # which is a concern if URLs are suggested that the user does not want to connect to.
          "browser.urlbar.speculativeConnect.enabled" = false;

          # https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
          # Website owners can track the battery status of your device.
          "dom.battery.enabled" = false;

          # https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
          # Disable that websites can get notifications if you copy, paste, or cut something from a web page,
          # and it lets them know which part of the page had been selected.
          "dom.event.clipboardevents.enabled" = false;

          # https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
          # Only accept from the originating site (block third party cookies)
          "network.cookie.cookieBehavior" = 1;

          # DNS-over-HTTPS
          # https://www.privacy-handbuch.de/handbuch_21w.htm
          "network.trr.mode" = 3;
          "network.trr.uri" = "https://doh.ffmuc.net/dns-query";

          # Don't automatically save PDF files in ~/Downloads/
          "browser.download.start_downloads_in_tmp_dir" = true;
          # Ask where to save before starting download.
          "browser.download.useDownloadDir" = false;
          # Restore previous session.
          "browser.startup.page" = 3;

          # Reduce spaces between UI elements. Larger website space.
          "browser.uidensity" = 1;
        };

        # This is recommended since Firefox will replace the symlink for the search configuration on every launch.
        search.force = true;
        search.default = "Startpage";
        search.engines = {
          "Amazon.de".metaData.hidden = true;
          "Bing".metaData.hidden = true;
          "Google".metaData.hidden = true;

          "NixOS Wiki" = {
            urls = [{ template = "https://nixos.wiki/index.php?search={searchTerms}"; }];
            iconUpdateURL = "https://nixos.wiki/favicon.png";
            updateInterval = 24 * 60 * 60 * 1000; # Every day
            definedAliases = [ "@nw" ];
          };

          "Startpage" = {
            urls = [{ template = "https://www.startpage.com/sp/search?query={searchTerms}"; }];
            iconUpdateURL = "https://www.startpage.com/sp/cdn/favicons/favicon-32x32--default.png";
            updateInterval = 24 * 60 * 60 * 1000; # Every day
            definedAliases = [ "@sp" ];
          };
        };

        # https://mipmip.github.io/home-manager-option-search/?query=firefox.profiles.%3Cname%3E.extensions
        # https://nur.nix-community.org/repos/rycee/
        extensions = with pkgs.nur.repos.rycee.firefox-addons; [
          ublock-origin
          # Automatically learns to block invisible trackers.
          # Activates "Global Privacy Control" and "Do Not Track".
          # It is compatible with oter ad-blockers: https://privacybadger.org/#Is-Privacy-Badger-compatible-with-other-extensions%2c-including-other-adblockers
          privacy-badger
          # Provides autofill for KeePassXC.
          keepassxc-browser
          # Sync bookmarks with Nextcloud.
          floccus
          snowflake
          simple-tab-groups
          smart-referer
          # noscript
          # video-downloadhelper

          decentraleyes
          # or
          #localcdn
        ];
      };
    };
  };
}