diff --git a/cobalt/network/switches.cc b/cobalt/network/switches.cc
index eff2b39135ea..6d8ba1b0091a 100644
--- a/cobalt/network/switches.cc
+++ b/cobalt/network/switches.cc
@@ -55,6 +55,13 @@ const char kMaxNetworkDelayHelp[] =
 const char kDisableInAppDial[] = "disable_in_app_dial";
 const char kDisableInAppDialHelp[] = "Disable the in-app dial server.";
 
+const char kQuicConnectionOptions[] = "quic_connection_options";
+const char kQuicConnectionOptionsHelp[] = "Specify QUIC connection options.";
+
+const char kQuicClientConnectionOptions[] = "quic_client_connection_options.";
+const char kQuicClientConnectionOptionsHelp[] =
+    "Specify QUIC client connection options";
+
 #endif  // ENABLE_DEBUG_COMMAND_LINE_SWITCHES
 
 const char kDisableQuic[] = "disable_quic";
@@ -72,6 +79,8 @@ std::map<std::string, const char*> HelpMap() {
       {kNetLogCaptureMode, kNetLogCaptureModeHelp},
       {kUserAgent, kUserAgentHelp},
       {kDisableInAppDial, kDisableInAppDialHelp},
+      {kQuicConnectionOptions, kQuicConnectionOptionsHelp},
+      {kQuicClientConnectionOptions, kQuicClientConnectionOptionsHelp},
 #endif  // !defined(ENABLE_DEBUG_COMMAND_LINE_SWITCHES)
       {kDisableQuic, kDisableQuicHelp},
       {kDisableHttp2, kDisableHttp2Help},
diff --git a/cobalt/network/switches.h b/cobalt/network/switches.h
index c4880bb7ea8e..ac026dd88dda 100644
--- a/cobalt/network/switches.h
+++ b/cobalt/network/switches.h
@@ -29,6 +29,8 @@ extern const char kUserAgent[];
 extern const char kMaxNetworkDelay[];
 extern const char kMaxNetworkDelayHelp[];
 extern const char kDisableInAppDial[];
+extern const char kQuicConnectionOptions[];
+extern const char kQuicClientConnectionOptions[];
 #endif  // ENABLE_DEBUG_COMMAND_LINE_SWITCHES
 extern const char kDisableQuic[];
 extern const char kDisableHttp2[];
diff --git a/cobalt/network/url_request_context.cc b/cobalt/network/url_request_context.cc
index 666cf4fe8b06..1301d327a151 100644
--- a/cobalt/network/url_request_context.cc
+++ b/cobalt/network/url_request_context.cc
@@ -54,6 +54,7 @@
 #include "net/quic/quic_context.h"
 #include "net/ssl/ssl_config_service.h"
 #include "net/ssl/ssl_config_service_defaults.h"
+#include "net/third_party/quiche/src/quiche/quic/core/quic_tag.h"
 #include "starboard/common/murmurhash2.h"
 #include "starboard/configuration_constants.h"
 
@@ -207,9 +208,25 @@ URLRequestContext::URLRequestContext(
   auto quic_context = std::make_unique<net::QuicContext>();
   quic_context->params()->supported_versions =
       quic::ParsedQuicVersionVector{quic::ParsedQuicVersion::Q046()};
-  url_request_context_builder->set_quic_context(std::move(quic_context));
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+
+  std::string quic_connection_options =
+      command_line->GetSwitchValueASCII(switches::kQuicConnectionOptions);
+  if (!quic_connection_options.empty()) {
+    quic_context->params()->connection_options =
+        quic::ParseQuicTagVector(quic_connection_options);
+  }
+
+  std::string quic_client_connection_options =
+      command_line->GetSwitchValueASCII(switches::kQuicClientConnectionOptions);
+  if (!quic_connection_options.empty()) {
+    quic_context->params()->client_connection_options =
+        quic::ParseQuicTagVector(quic_client_connection_options);
+  }
+
+  url_request_context_builder->set_quic_context(std::move(quic_context));
+
   bool quic_enabled =
       configuration::Configuration::GetInstance()->CobaltEnableQuic() &&
       !command_line->HasSwitch(switches::kDisableQuic);
diff --git a/net/third_party/quiche/src/quiche/quic/core/quic_constants.h b/net/third_party/quiche/src/quiche/quic/core/quic_constants.h
index dfd908e92eb6..8fa38753a7d2 100644
--- a/net/third_party/quiche/src/quiche/quic/core/quic_constants.h
+++ b/net/third_party/quiche/src/quiche/quic/core/quic_constants.h
@@ -294,8 +294,8 @@ inline constexpr int kDefaultIetfLossDelayShift = 3;
 
 // Maximum number of retransmittable packets received before sending an ack.
 inline constexpr QuicPacketCount kDefaultRetransmittablePacketsBeforeAck = 2;
-// Wait for up to 10 retransmittable packets before sending an ack.
-inline constexpr QuicPacketCount kMaxRetransmittablePacketsBeforeAck = 10;
+// Wait for up to 50 retransmittable packets before sending an ack.
+inline constexpr QuicPacketCount kMaxRetransmittablePacketsBeforeAck = 50;
 // Minimum number of packets received before ack decimation is enabled.
 // This intends to avoid the beginning of slow start, when CWNDs may be
 // rapidly increasing.