diff --git a/source/Makefile b/source/Makefile
index e862b78..500fb1e 100644
--- a/source/Makefile
+++ b/source/Makefile
@@ -243,11 +243,11 @@ else
 		LDFLAGS += --pre-js wasm_pre.js
 		# LDFLAGS += --preload-file eval/nn.bin
 		LDFLAGS += -s MODULARIZE=1 -s EXPORT_NAME="$(EM_EXPORT_NAME)" -s ENVIRONMENT=web,worker,node
-		LDFLAGS += -s PTHREAD_POOL_SIZE=32
+		LDFLAGS += -s PTHREAD_POOL_SIZE=2
 		# -s PTHREAD_POOL_SIZE_STRICT=32
 		LDFLAGS += -s FILESYSTEM=1 -s EXIT_RUNTIME=0 -s "EXPORTED_RUNTIME_METHODS=['FS','ccall']"
-		LDFLAGS += -s ALLOW_MEMORY_GROWTH=1 -s INITIAL_MEMORY=$(EM_INITIAL_MEMORY_SIZE) -s MAXIMUM_MEMORY=4294967296
-		LDFLAGS += -s STACK_SIZE=67108864
+		LDFLAGS += -s ALLOW_MEMORY_GROWTH=1 -s INITIAL_MEMORY=$(EM_INITIAL_MEMORY_SIZE) -s MAXIMUM_MEMORY=536870912
+		LDFLAGS += -s STACK_SIZE=8388608
 		# LDFLAGS += -s PROXY_TO_PTHREAD
 		# LDFLAGS += -s ALLOW_UNIMPLEMENTED_SYSCALLS
 		# LDFLAGS += -s ASSERTIONS
diff --git a/source/eval/nnue/evaluate_nnue.cpp b/source/eval/nnue/evaluate_nnue.cpp
index 1af65ed..c16f9f2 100644
--- a/source/eval/nnue/evaluate_nnue.cpp
+++ b/source/eval/nnue/evaluate_nnue.cpp
@@ -1,4 +1,4 @@
-// NNUE評価関数の計算に関するコード
+// NNUE評価関数の計算に関するコード
 
 #include "../../config.h"
 
@@ -373,8 +373,12 @@ namespace {
 		}
 #if defined(SFNNwoPSQT) && NNUE_SFNN_PROGRESS_BUCKETS != 1
 		const std::string eval_dir = Options["EvalDir"];
+#if defined(__EMSCRIPTEN__)
+        const auto progress_path = Path::Combine(eval_dir, "progress.bin");
+#else
 		const auto progress_path = Path::Combine(
 		    Path::Combine(Directory::GetBinaryFolder(), eval_dir), "progress.bin");
+#endif
 		std::ifstream progress_stream(progress_path, std::ios::binary);
 		sync_cout << "info string loading progress file : " << progress_path << sync_endl;
 		result = progress_stream.is_open()
diff --git a/source/usi.cpp b/source/usi.cpp
index 3bf539a..398255e 100644
--- a/source/usi.cpp
+++ b/source/usi.cpp
@@ -1,4 +1,4 @@
-#include <cstdlib>
+#include <cstdlib>
 #include <sstream>
 #include <queue>
 
@@ -345,6 +345,19 @@ bool USIEngine::usi_cmdexec(const std::string& cmd) {
     else if (token == "d")
         sync_cout << engine.visualize() << sync_endl;
 
+#if defined(__EMSCRIPTEN__)
+    // Keep browser rules identical to the search engine, including repetition.
+    else if (token == "webstate") {
+        auto& pos = engine.get_position();
+        sync_cout << "webstate " << pos.sfen() << "|" << int(pos.in_check())
+                  << "|" << int(pos.is_repetition(0))
+                  << "|" << int(pos.DeclarationWin() != Move::none()) << "|";
+        for (auto m : MoveList<LEGAL_ALL>(pos))
+            std::cout << m << ' ';
+        std::cout << sync_endl;
+    }
+#endif
+
     // 現在の局面の評価値を表示する。
     else if (token == "eval")
         engine.trace_eval();