diff --git a/cmd/host/main.go b/cmd/host/main.go
index f4168721..db6f4da7 100644
--- a/cmd/host/main.go
+++ b/cmd/host/main.go
@@ -46,7 +46,11 @@ var apiMap = map[string]func(params json.RawMessage) (data any, err error){
 		return false, nil
 	},
 	"create": func(params json.RawMessage) (data any, err error) {
-		err = browser.OpenURL(fmt.Sprintf("%s:///create?params=%s", identifier, string(params)))
+		var strParams string
+		if err = json.Unmarshal(params, &strParams); err != nil {
+			return
+		}
+		err = browser.OpenURL(fmt.Sprintf("%s:///create?params=%s", identifier, strParams))
 		return
 	},
 }
diff --git a/ui/flutter/lib/app/modules/app/controllers/app_controller.dart b/ui/flutter/lib/app/modules/app/controllers/app_controller.dart
index 6bbcf254..45baea01 100644
--- a/ui/flutter/lib/app/modules/app/controllers/app_controller.dart
+++ b/ui/flutter/lib/app/modules/app/controllers/app_controller.dart
@@ -337,7 +337,8 @@ class AppController extends GetxController with WindowListener, TrayListener {
       if (uri.path == "/create") {
         final params = uri.queryParameters["params"];
         if (params?.isNotEmpty == true) {
-          final paramsJson = String.fromCharCodes(base64Decode(params!));
+          final paramsJson =
+              String.fromCharCodes(base64Decode(base64.normalize(params!)));
           Get.rootDelegate.offAndToNamed(Routes.REDIRECT,
               arguments: RedirectArgs(Routes.CREATE,
                   arguments:
diff --git a/ui/flutter/lib/util/browser_extension_host/entry/browser_extension_host_native.dart b/ui/flutter/lib/util/browser_extension_host/entry/browser_extension_host_native.dart
index 828e5404..ce1c27c5 100644
--- a/ui/flutter/lib/util/browser_extension_host/entry/browser_extension_host_native.dart
+++ b/ui/flutter/lib/util/browser_extension_host/entry/browser_extension_host_native.dart
@@ -36,7 +36,12 @@ Future<void> doInstallHost() async {
   // Check if host binary is not installed
   if (!await File(hostPath).exists()) {
     final hostData = await getHostAssetData();
-    await File(hostPath).writeAsBytes(hostData);
+    final file = File(hostPath);
+    await file.writeAsBytes(hostData);
+    // Add execute permission
+    if (!Platform.isWindows) {
+      await Process.run('chmod', ['+x', hostPath]);
+    }
     return;
   }
   // Check if host binary is outdated