diff --git components/embedder_support/user_agent_utils.cc components/embedder_support/user_agent_utils.cc
index 4c38233047000..4601ad9df744d 100644
--- components/embedder_support/user_agent_utils.cc
+++ components/embedder_support/user_agent_utils.cc
@@ -15,6 +15,7 @@
 #include "base/version.h"
 #include "build/branding_buildflags.h"
 #include "build/build_config.h"
+#include "cef/libcef/common/cef_switches.h"
 #include "components/embedder_support/pref_names.h"
 #include "components/embedder_support/switches.h"
 #include "components/policy/core/common/policy_pref_names.h"
@@ -353,6 +354,12 @@ std::string GetMajorVersionForUserAgentString(
 
 std::string GetProduct(const bool allow_version_override,
                        ForceMajorVersionToMinorPosition force_major_to_minor) {
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kUserAgentProductAndVersion)) {
+    return command_line->GetSwitchValueASCII(
+        switches::kUserAgentProductAndVersion);
+  }
+
   // FF Priority 1: force major version to 99 and minor version to major version
   // number.
   if (allow_version_override &&