setSystemPropertyAsBoolean(Constants.SEARCH_FILE_PROXY_PROPERTY, value);
    }

    default boolean isSearchFileProxyEnabled() {
        return getSystemPropertyAsBoolean(Constants.SEARCH_FILE_PROXY_PROPERTY, true);
    }

    default void setUseBrowserLocaleForSearch(final boolean value) {
        setSystemPropertyAsBoolean(Constants.USE_BROWSER_LOCALE_FOR_SEARCH_PROPERTY, value);

            // pre-authenticate
            authenticator = new org.codelibs.spnego.SpnegoAuthenticator(config);

            fessConfig.setSystemPropertyAsBoolean(SPNEGO_INITIALIZED, true);
            fessConfig.storeSystemProperties();
            return authenticator;
        } catch (final Exception e) {