diff --git a/base/system/sys_info_starboard.cc b/base/system/sys_info_starboard.cc
index 3fea0a621ff..d5c1426a4a5 100644
--- a/base/system/sys_info_starboard.cc
+++ b/base/system/sys_info_starboard.cc
@@ -78,6 +78,11 @@ std::string SbSysInfo::Brand() {
   __system_property_get("ro.product.brand", brand_str);
   return std::string(brand_str);
 }
+
+std::string SbSysInfo::OSFriendlyName() {
+  return "AOSP";
+}
+
 #elif BUILDFLAG(IS_STARBOARD)
 std::string SbSysInfo::OriginalDesignManufacturer() {
   return GetSystemPropertyString(kSbSystemPropertySystemIntegratorName);
@@ -95,6 +100,10 @@ std::string SbSysInfo::Brand() {
   return GetSystemPropertyString(kSbSystemPropertyBrandName);
 }
 
+std::string SbSysInfo::OSFriendlyName() {
+  return GetSystemPropertyString(kSbSystemPropertyFriendlyName);
+}
+
 #elif BUILDFLAG(IS_IOS_TVOS)
 std::string SbSysInfo::OriginalDesignManufacturer() {
   // Cobalt 25: https://github.com/youtube/cobalt/blob/62c2380b7eb0da5889a387c4b9be283656a8575d/starboard/shared/uikit/system_get_property.mm#L126
@@ -152,6 +161,11 @@ std::string SbSysInfo::Brand() {
   return "Apple";
 }
 
+std::string SbSysInfo::OSFriendlyName() {
+  NOTIMPLEMENTED();
+  return ""
+}
+
 #endif  // BUILDFLAG(IS_ANDROID)
 
 }  // namespace starboard
diff --git a/base/system/sys_info_starboard.h b/base/system/sys_info_starboard.h
index 6f75bcaf21d..1691a411fe3 100644
--- a/base/system/sys_info_starboard.h
+++ b/base/system/sys_info_starboard.h
@@ -31,9 +31,11 @@ class BASE_EXPORT SbSysInfo {
   static std::string ModelYear();
 
   static std::string Brand();
+
+  static std::string OSFriendlyName();
 };
 
 }  // namespace starboard
 }  // namespace base
 
-#endif  // BASE_SYSTEM_SYS_INFO_STARBOARD_H_
\ No newline at end of file
+#endif  // BASE_SYSTEM_SYS_INFO_STARBOARD_H_
diff --git a/base/system/sys_info_starboard_unittest.cc b/base/system/sys_info_starboard_unittest.cc
index 46a672252b8..c548ed1b9db 100644
--- a/base/system/sys_info_starboard_unittest.cc
+++ b/base/system/sys_info_starboard_unittest.cc
@@ -22,7 +22,7 @@
 namespace base {
 namespace starboard {
 
-#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS_TVOS)
+#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS_TVOS) || BUILDFLAG(IS_STARBOARD)
 
 using SbSysInfoTest = PlatformTest;
 
@@ -46,6 +46,10 @@ TEST_F(SbSysInfoTest, Brand) {
   EXPECT_NE(brand_str, "");
 }
 
+TEST_F(SbSysInfoTest, OSFriendlyName) {
+  std::string os_name_str = SbSysInfo::OSFriendlyName();
+  EXPECT_NE(os_name_str, "");
+}
 #endif
 
 }  // namespace starboard
diff --git a/cobalt/browser/user_agent/user_agent_platform_info.cc b/cobalt/browser/user_agent/user_agent_platform_info.cc
index c1ae7f208d9..f2283b0fefa 100644
--- a/cobalt/browser/user_agent/user_agent_platform_info.cc
+++ b/cobalt/browser/user_agent/user_agent_platform_info.cc
@@ -190,7 +190,12 @@ void UserAgentPlatformInfo::InitializePlatformDependentFieldsAndroid() {
 }
 #elif BUILDFLAG(IS_STARBOARD)
 void UserAgentPlatformInfo::InitializePlatformDependentFieldsStarboard() {
-  const std::string os_name = base::SysInfo::OperatingSystemName();
+  std::string os_name = base::SysInfo::OperatingSystemName();
+  const std::string os_friendly_name =
+      base::starboard::SbSysInfo::OSFriendlyName();
+  if (!os_friendly_name.empty()) {
+    os_name = os_friendly_name + "; " + os_name;
+  }
   const std::string os_version = base::SysInfo::OperatingSystemVersion();
   set_os_name_and_version(
       base::StringPrintf("%s %s", os_name.c_str(), os_version.c_str()));