configuration.nix/home/programs/firefox.nix

{
  pkgs,
  osConfig,
  ...
}: {
  programs = {
    firefox = {
      enable = true;
      package = pkgs.firefox.override {
        extraPolicies = {
          DontCheckDefaultBrowser = true;
          DisablePocket = true;
          DisableTelemetry = true;
          DisplayBookmarksToolbar = "always";
          EnableTrackingProtection = {
            Value = true;
            Locked = true;
            Cryptomining = true;
          };
          FirefoxHome = {
            Search = true;
            TopSites = false;
            SponsoredTopSites = false;
            Highlights = false;
            Pocket = false;
            SponsoredPocket = false;
            Snippets = false;
            Locked = true;
          };
          UserMessaging = {
            WhatsNew = false;
            ExtensionRecommendations = false;
            FeatureRecommendations = false;
            UrlbarInterventions = false;
            SkipOnboarding = true;
            MoreFromMozilla = false;
          };
          NoDefaultBookmarks = true;
          OfferToSaveLogins = false;
          SearchSuggestEnabled = false;
          OverrideFirstRunPage = "";
          OverridePostUpdatePage = "";
          ExtensionSettings = {
            "{b743f56d-1cc1-4048-8ba6-f9c2ab7aa54d}" = {
              "allowed_types" = "theme";
              "installation_mode" = "force_installed";
              "install_url" = "https://addons.mozilla.org/firefox/downloads/latest/dracula-dark-colorscheme/latest.xpi";
            };
            "{d634138d-c276-4fc8-924b-40a0ea21d284}" = {
              "allowed_types" = "extension";
              "installation_mode" = "force_installed";
              "install_url" = "https://addons.mozilla.org/firefox/downloads/latest/1password-x-password-manager/latest.xpi";
            };
            "{446900e4-71c2-419f-a6a7-df9c091e268b}" = {
              "allowed_types" = "extension";
              "installation_mode" = "force_installed";
              "install_url" = "https://addons.mozilla.org/firefox/downloads/latest/bitwarden-password-manager/latest.xpi";
            };
            "queryamoid@kaply.com" = {
              "allowed_types" = "extension";
              "installation_mode" = "force_installed";
              "install_url" = "https://github.com/mkaply/queryamoid/releases/download/v0.2/query_amo_addon_id-0.2-fx.xpi";
            };
          };
          Preferences = {
            "browser.crashReports.unsubmittedCheck.autoSubmit2" = {
              Value = false;
              Status = "locked";
            };
            "browser.selfsupport.url" = {
              Value = "";
              Status = "locked";
            };
            "browser.aboutConfig.showWarning" = {
              Value = false;
              Status = "locked";
            };
            "browser.aboutHomeSnippets.updateUrl" = {
              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";
            };
            "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";
            };
          };
        };
      };
      profiles.default = {
        id = 0;
        name = "Default";
        isDefault = true;
        settings = {
          "app.shield.optoutstudies.enabled" = false;
          "identity.fxaccounts.account.device.name" = osConfig.networking.hostName;
          "privacy.donottrackheader.enabled" = true;
          "privacy.firstparty.isolate" = true;
          "startup.homepage_welcome_url" = "";
          "startup.homepage_welcome_url.additional" = "";
          "startup.homepage_override_url" = "";
        };
      };
    };
  };
}