diff --git a/quiche/common/quiche_feature_flags_list.h b/quiche/common/quiche_feature_flags_list.h
index dbdcb33..52a8c84 100755
--- a/quiche/common/quiche_feature_flags_list.h
+++ b/quiche/common/quiche_feature_flags_list.h
@@ -12,7 +12,7 @@
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_act_upon_invalid_header, true, true, "If true, reject or send error response code upon receiving invalid request or response headers.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_add_stream_info_to_idle_close_detail, false, true, "If true, include stream information in idle timeout connection close detail.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_allow_client_enabled_bbr_v2, true, true, "If true, allow client to enable BBRv2 on server via connection option 'B2ON'.")
-QUICHE_FLAG(bool, quiche_reloadable_flag_quic_avoid_nested_close_connection, false, true, "If true, if QuicConnection::CloseConnection triggers a nested call to itself, make the nested call a no-op.")
+QUICHE_FLAG(bool, quiche_reloadable_flag_quic_avoid_nested_close_connection, true, true, "If true, if QuicConnection::CloseConnection triggers a nested call to itself, make the nested call a no-op.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_bbr2_extra_acked_window, false, true, "When true, the BBR4 copt sets the extra_acked window to 20 RTTs and BBR5 sets it to 40 RTTs.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_bbr2_probe_two_rounds, true, true, "When true, the BB2U copt causes BBR2 to wait two rounds with out draining the queue before exiting PROBE_UP and BB2S has the same effect in STARTUP.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_bbr2_simplify_inflight_hi, true, true, "When true, the BBHI copt causes QUIC BBRv2 to use a simpler algorithm for raising inflight_hi in PROBE_UP.")
@@ -32,7 +32,7 @@
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_disable_version_rfcv1, false, false, "If true, disable QUIC version h3 (RFCv1).")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_discard_initial_packet_with_key_dropped, false, true, "If true, discard INITIAL packet if the key has been dropped.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_dispatcher_only_serialize_close_if_closed_by_self, false, false, "If true, QuicDispatcher::CleanUpSession only serializes a connection close if the connection is closed by self, did not complete handshake and does not have termination packets.")
-QUICHE_FLAG(bool, quiche_reloadable_flag_quic_ecn_in_first_ack, false, true, "When true, reports ECN in counts in the ACK of the a client initial that goes in the buffered packet store.")
+QUICHE_FLAG(bool, quiche_reloadable_flag_quic_ecn_in_first_ack, true, true, "When true, reports ECN in counts in the ACK of the a client initial that goes in the buffered packet store.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_enable_chaos_protection_v2, false, true, "If true, enable Chaos Protection v2 and use new QuicChaosProtector implementation.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_enable_disable_resumption, true, true, "If true, disable resumption when receiving NRES connection option.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_enable_mtu_discovery_at_server, false, false, "If true, QUIC will default enable MTU discovery at server, with a target of 1450 bytes.")
@@ -63,7 +63,7 @@
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_use_alarm_multiplexer, false, false, "Manages all of the connection alarms via QuicAlarmMultiplexer.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_use_received_client_addresses_cache, true, true, "If true, use a LRU cache to record client addresses of packets received on server's original address.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_version_negotiation_rfc, false, true, "If true, use the RFC version of the version negotiation transport parameter.")
-QUICHE_FLAG(bool, quiche_restart_flag_quic_support_flow_label2, false, true, "If true, QUIC will support reading and writing IPv6 flow labels.")
+QUICHE_FLAG(bool, quiche_restart_flag_quic_support_flow_label2, true, true, "If true, QUIC will support reading and writing IPv6 flow labels.")
 QUICHE_FLAG(bool, quiche_restart_flag_quic_support_release_time_for_gso, false, false, "If true, QuicGsoBatchWriter will support release time if it is available and the process has the permission to do so.")
 QUICHE_FLAG(bool, quiche_restart_flag_quic_testonly_default_false, false, false, "A testonly restart flag that will always default to false.")
 QUICHE_FLAG(bool, quiche_restart_flag_quic_testonly_default_true, true, true, "A testonly restart flag that will always default to true.")