diff --git a/intl/components/moz.build b/intl/components/moz.build
index b0af60b999..28c221136e 100644
--- a/intl/components/moz.build
+++ b/intl/components/moz.build
@@ -89,3 +89,6 @@ if CONFIG["MOZ_ICU4X"]:
 DEFINES["MOZ_HAS_MOZGLUE"] = True
 
 Library("intlcomponents")
+
+# DOM Mask
+LOCAL_INCLUDES += ["/camoucfg"]
\ No newline at end of file
diff --git a/intl/components/src/TimeZone.cpp b/intl/components/src/TimeZone.cpp
index 5b09dfdcc5..98a78b33cc 100644
--- a/intl/components/src/TimeZone.cpp
+++ b/intl/components/src/TimeZone.cpp
@@ -8,7 +8,8 @@
 
 #include <algorithm>
 #include <string_view>
-
+#include "unicode/unistr.h"
+#include "MaskConfig.hpp"
 #include "unicode/uenum.h"
 #if MOZ_INTL_USE_ICU_CPP_TIMEZONE
 #  include "unicode/basictz.h"
@@ -22,7 +23,21 @@ Result<UniquePtr<TimeZone>, ICUError> TimeZone::TryCreate(
     Maybe<Span<const char16_t>> aTimeZoneOverride) {
   const UChar* zoneID = nullptr;
   int32_t zoneIDLen = 0;
-  if (aTimeZoneOverride) {
+
+  if (auto value = MaskConfig::GetString("timezone")) {
+    std::string camouTimeZone = value.value();
+
+    // Because we don't have access to NS_ConvertUTF8toUTF16 here,
+    // convert UTF-8 to UTF-16 using ICU's UnicodeString
+    icu::UnicodeString uniStr = icu::UnicodeString::fromUTF8(camouTimeZone);
+
+    if (uniStr.isBogus()) {
+      return Err(ICUError::InternalError);
+    }
+
+    zoneIDLen = uniStr.length();
+    zoneID = uniStr.getBuffer();
+  } else if (aTimeZoneOverride) {
     zoneIDLen = static_cast<int32_t>(aTimeZoneOverride->Length());
     zoneID = aTimeZoneOverride->Elements();
   }