configuration.nix/home/programs/firefox.nix

{ pkgs, osConfig, ... }: {
  programs = {
    firefox = {
      enable = true;
      package = pkgs.firefox.override {
        extraPolicies = {
          DisableAppUpdate = true;
          DisableFirefoxAccounts = true;
          DisableFirefoxStudies = true;
          DisableFormHistory = true;
          DisablePocket = true;
          DisableTelemetry = true;
          DisplayBookmarksToolbar = "newtab";
          DontCheckDefaultBrowser = true;
          EnableTrackingProtection = {
            Value = true;
            Locked = true;
            Cryptomining = true;
            EmailTracking = true;
            Fingerprinting = true;
          };
          ExtensionSettings = {
            "{b743f56d-1cc1-4048-8ba6-f9c2ab7aa54d}" = {
              installation_mode = "force_installed";
              install_url = "https://addons.mozilla.org/firefox/downloads/latest/dracula-dark-colorscheme/latest.xpi";
            };
            "{d634138d-c276-4fc8-924b-40a0ea21d284}" = {
              installation_mode = "force_installed";
              install_url = "https://addons.mozilla.org/firefox/downloads/latest/1password-x-password-manager/latest.xpi";
            };
            "uBlock0@raymondhill.net" = {
              installation_mode = "force_installed";
              install_url = "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi";
            };

            "google@search.mozilla.org" = {
              installation_mode = "blocked";
            };
            "bing@search.mozilla.org" = {
              installation_mode = "blocked";
            };
          };
          FirefoxHome = {
            Search = true;
            TopSites = false;
            SponsoredTopSites = false;
            Highlights = false;
            Pocket = false;
            SponsoredPocket = false;
            Snippets = false;
            Locked = true;
          };
          FirefoxSuggest = {
            WebSuggestions = false;
            SponsoredSuggestions = false;
            ImproveSuggest = false;
            Locked = true;
          };
          Homepage = {
            StartPage = "previous-session";
            Locked = true;
          };
          NetworkPrediction = false;
          NoDefaultBookmarks = true;
          OfferToSaveLogins = false;
          OverrideFirstRunPage = "";
          OverridePostUpdatePage = "";
          PasswordManagerEnabled = false;
          SearchSuggestEnabled = false;
          UserMessaging = {
            WhatsNew = false;
            ExtensionRecommendations = false;
            FeatureRecommendations = false;
            UrlbarInterventions = false;
            SkipOnboarding = true;
            MoreFromMozilla = false;
            Locked = true;
          };
          Preferences = {
            "accessibility.force_disabled" = { Value = 1; Status = "locked"; };
            "browser.crashReports.unsubmittedCheck.autoSubmit2" = { Value = false; Status = "locked"; };
            "browser.aboutConfig.showWarning" = { Value = false; Status = "locked"; };
            "browser.aboutHomeSnippets.updateUrl" = { Value = ""; Status = "locked"; };
            "browser.selfsupport.url" = { Value = ""; Status = "locked"; };
            "browser.startup.homepage_override.mstone" = { Value = "ignore"; Status = "locked"; };
            "browser.startup.homepage_override.buildID" = { Value = ""; Status = "locked"; };
            "browser.tabs.firefox-view" = { Value = false; Status = "locked"; };
            "browser.urlbar.suggest.history" = { Value = false; Status = "locked"; };
            "browser.urlbar.suggest.topsites" = { Value = false; Status = "locked"; };
            "dom.security.https_only_mode" = { Value = true; Status = "locked"; };
            "extensions.htmlaboutaddons.recommendations.enabled" = { Value = false; Status = "locked"; };
            "extensions.recommendations.themeRecommendationUrl" = { Value = ""; Status = "locked"; };
            "network.IDN_show_punycode" = { Value = true; Status = "locked"; };
            "network.trr.mode" = { Value = 5; Status = "locked"; };
            "signon.management.page.breach-alerts.enabled" = { Value = false; Status = "locked"; };
          };
        };
      };
      profiles.default = {
        id = 0;
        name = "Default";
        isDefault = true;
        settings = {
          "app.shield.optoutstudies.enabled" = false;
          "privacy.donottrackheader.enabled" = true;
          "privacy.firstparty.isolate" = true;
          "privacy.globalprivacycontrol.enabled" = true;
          "startup.homepage_override_url" = "";
          "startup.homepage_welcome_url" = "";
          "startup.homepage_welcome_url.additional" = "";
        };
      };
    };
  };
}