fixed browser, made payload optional

proxy-playwrite.ts

@@ -70,7 +70,7 @@ async function testProxyBrowser() {
     console.error('❌ Proxy browser test failed:', { error });
   } finally {
     try {
-      // await Browser.cleanup();
+      await Browser.close();
       console.log('🧹 Browser cleanup completed');
     } catch (cleanupError) {
       console.error('Failed to cleanup browser:', { error: cleanupError });