{
  lib,
  config,
  pkgs,
  ...
}:
with lib;
with lib.custom; let
  cfg = config.apps.web.librewolf;
in {
  options.apps.web.librewolf = with types; {
    enable = mkBoolOpt false "Enable or disable librewolf";

    setDefault = mkBoolOpt false "Set Librewolf as default browser";
  };

  config = mkIf cfg.enable {
    xdg.mimeApps.defaultApplications = mkIf cfg.setDefault {
      "text/html" = "librewolf.desktop";
      "x-scheme-handler/http" = "librewolf.desktop";
      "x-scheme-handler/https" = "librewolf.desktop";
    };

    programs.librewolf = {
      enable = true;

      profiles.${config.home.username} = {
        id = 0;
        isDefault = true;

        search = {
          default = "SearXNG";

          engines = {
            "NixOS Options" = {
              urls = [
                {
                  template = "https://search.nixos.org/options?query={searchTerms}";
                }
              ];

              icon = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
              definedAliases = ["@nixos"];
            };

            "Nix Packages" = {
              urls = [
                {
                  template = "https://search.nixos.org/packages?query={searchTerms}";
                }
              ];

              icon = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
              definedAliases = ["@nixpkgs"];
            };

            "OpenStreetMap" = {
              urls = [
                {
                  template = "https://www.openstreetmap.org/search?query={searchTerms}";
                }
              ];

              icon = "https://www.openstreetmap.org/favicon.ico";
              definedAliases = ["@openstreetmap" "@osm"];
            };

            "SearXNG" = {
              urls = [
                {
                  template = "https://search.zoeys.computer/searx/search?q={searchTerms}";
                }
              ];

              icon = "https://search.zoeys.computer/searx/static/themes/simple/img/favicon.svg";
              definedAliases = ["@searx"];
            };

            "docs.rs" = {
              urls = [
                {
                  template = "https://docs.rs/releases/search?query={searchTerms}";
                }
              ];

              icon = "https://docs.rs/-/static/favicon.ico";
              definedAliases = ["@docs"];
            };

            "crates.io" = {
              urls = [
                {
                  template = "https://crates.io/search?q={searchTerms}";
                }
              ];

              icon = "https://crates.io/assets/cargo.png";
              definedAliases = ["@crates"];
            };
          };

          force = true; # Required to prevent search engine symlink being overwritten. See https://github.com/nix-community/home-manager/issues/3698
        };
      };

      policies = {
        DisableTelemetry = true;

        Preferences = {
          "app.normandy.api_url" = "";
          "app.normandy.enabled" = false;
          "app.shield.optoutstudies.enabled" = false;
          "app.update.auto" = false;
          "beacon.enabled" = false;
          "breakpad.reportURL" = "";
          "browser.aboutConfig.showWarning" = false;
          "browser.cache.offline.enable" = false;
          "browser.crashReports.unsubmittedCheck.autoSubmit" = false;
          "browser.crashReports.unsubmittedCheck.autoSubmit2" = false;
          "browser.crashReports.unsubmittedCheck.enabled" = false;
          "browser.disableResetPrompt" = true;
          "browser.newtab.preload" = false;
          "browser.newtabpage.activity-stream.section.highlights.includePocket" = false;
          "browser.newtabpage.enhanced" = false;
          "browser.newtabpage.introShown" = true;
          "browser.newtabpage.activity-stream.showSponsoredTopSites" = false;
          "browser.newtabpage.activity-stream.showSponsored" = false;
          "browser.newtabpage.activity-stream.system.showSponsored" = false;
          "browser.safebrowsing.appRepURL" = "";
          "browser.safebrowsing.blockedURIs.enabled" = false;
          "browser.safebrowsing.downloads.enabled" = false;
          "browser.safebrowsing.downloads.remote.enabled" = false;
          "browser.safebrowsing.downloads.remote.url" = "";
          "browser.safebrowsing.enabled" = false;
          "browser.safebrowsing.malware.enabled" = false;
          "browser.safebrowsing.phishing.enabled" = false;
          "browser.selfsupport.url" = "";
          "browser.send_pings" = false;
          "browser.sessionstore.privacy_level" = 0;
          "browser.shell.checkDefaultBrowser" = false;
          "browser.startup.homepage_override.mstone" = "";
          "browser.tabs.crashReporting.sendReport" = false;
          "browser.urlbar.groupLabels.enabled" = false;
          "browser.urlbar.quicksuggest.enabled" = false;
          "browser.urlbar.speculativeConnect.enabled" = false;
          "browser.urlbar.trimURLs" = false;
          "browser.urlbar.suggest.quicksuggest.sponsored" = false;
          "datareporting.healthreport.service.enabled" = false;
          "datareporting.healthreport.uploadEnabled" = false;
          "datareporting.policy.dataSubmissionEnabled" = false;
          "device.sensors.ambientLight.enabled" = false;
          "device.sensors.enabled" = false;
          "device.sensors.motion.enabled" = false;
          "device.sensors.orientation.enabled" = false;
          "device.sensors.proximity.enabled" = false;
          "dom.battery.enabled" = false;
          "dom.event.clipboardevents.enabled" = false;
          "dom.webaudio.enabled" = false;
          "experiments.activeExperiment" = false;
          "experiments.enabled" = false;
          "experiments.manifest.uri" = "";
          "experiments.supported" = false;
          "extensions.ClearURLs@kevinr.whiteList" = "";
          "extensions.Decentraleyes@ThomasRientjes.whiteList" = "";
          "extensions.FirefoxMulti-AccountContainers@mozilla.whiteList" = "";
          "extensions.TemporaryContainers@stoically.whiteList" = "";
          "extensions.autoDisableScopes" = 14;
          "extensions.getAddons.cache.enabled" = false;
          "extensions.getAddons.showPane" = false;
          "extensions.greasemonkey.stats.optedin" = false;
          "extensions.greasemonkey.stats.url" = "";
          "extensions.pocket.enabled" = false;
          "extensions.shield-recipe-client.api_url" = "";
          "extensions.shield-recipe-client.enabled" = false;
          "extensions.webservice.discoverURL" = "";
          "media.autoplay.default" = 0;
          "media.autoplay.enabled" = true;
          "media.eme.enabled" = false;
          "media.gmp-widevinecdm.enabled" = false;
          "media.navigator.enabled" = false;
          "media.peerconnection.enabled" = false;
          "media.video_stats.enabled" = false;
          "network.IDN_show_punycode" = true;
          "network.allow-experiments" = false;
          "network.captive-portal-service.enabled" = false;
          "network.cookie.cookieBehavior" = 1;
          "network.dns.disablePrefetch" = true;
          "network.dns.disablePrefetchFromHTTPS" = true;
          "network.http.referer.spoofSource" = true;
          "network.http.speculative-parallel-limit" = "";
          "network.predictor.enable-prefetch" = false;
          "network.predictor.enabled" = false;
          "network.prefetch-next" = false;
          "network.trr.mode" = "";
          "privacy.donottrackheader.enabled" = true;
          "privacy.donottrackheader.value" = "";
          "privacy.firstparty.isolate" = true;
          "privacy.query_stripping" = true;
          "privacy.trackingprotection.cryptomining.enabled" = true;
          "privacy.trackingprotection.enabled" = true;
          "privacy.trackingprotection.fingerprinting.enabled" = true;
          "privacy.trackingprotection.pbmode.enabled" = true;
          "privacy.usercontext.about_newtab_segregation.enabled" = true;
          "security.ssl.disable_session_identifiers" = true;
          "services.sync.prefs.sync.browser.newtabpage.activity-stream.showSponsoredTopSite" = false;
          "signon.autofillForms" = false;
          "toolkit.telemetry.archive.enabled" = false;
          "toolkit.telemetry.bhrPing.enabled" = false;
          "toolkit.telemetry.cachedClientID" = "";
          "toolkit.telemetry.enabled" = false;
          "toolkit.telemetry.firstShutdownPing.enabled" = false;
          "toolkit.telemetry.hybridContent.enabled" = false;
          "toolkit.telemetry.newProfilePing.enabled" = false;
          "toolkit.telemetry.prompted" = "";
          "toolkit.telemetry.rejected" = true;
          "toolkit.telemetry.reportingpolicy.firstRun" = false;
          "toolkit.telemetry.server" = "";
          "toolkit.telemetry.shutdownPingSender.enabled" = false;
          "toolkit.telemetry.unified" = false;
          "toolkit.telemetry.unifiedIsOptIn" = false;
          "toolkit.telemetry.updatePing.enabled" = false;
          "webgl.renderer-string-override" = " ";
          "webgl.vendor-string-override" = " ";
        };

        ExtensionSettings = with builtins; let
          extension = shortId: uuid: {
            name = uuid;
            value = {
              install_url = "https://addons.mozilla.org/en-US/firefox/downloads/latest/${shortId}/latest.xpi";
              installation_mode = "normal_installed";
            };
          };
        in
          listToAttrs [
            (extension "ublock-origin" "uBlock0@raymondhill.net")
            (extension "privacy-badger17" "jid1-MnnxcxisBPnSXQ@jetpack")
            (extension "1password-x-password-manager" "{d634138d-c276-4fc8-924b-40a0ea21d284}")
            (extension "firefox-color" "FirefoxColor@mozilla.com")
            (extension "multi-account-containers" "@testpilot-containers")
            (extension "temporary-containers" "{c607c8df-14a7-4f28-894f-29e8722976af}")
            (extension "styl-us" "{7a7a4a92-a2a0-41d1-9fd7-1e92480d612d}")
            (extension "betterttv" "firefox@betterttv.net")
            (extension "decentraleyes" "jid1-BoFifL9Vbdl2zQ@jetpack")
            (extension "canvasblocker" "CanvasBlocker@kkapsner.de")
            (extension "clearurls" "{74145f27-f039-47ce-a470-a662b129930a}")
            (extension "mtab" "contact@maxhu.dev")
          ];
      };
    };
  };
}