diff --git a/src/lib/amber.ts b/src/lib/amber.ts
index 1648b9c..2691c96 100644
--- a/src/lib/amber.ts
+++ b/src/lib/amber.ts
@@ -290,18 +290,14 @@ function buildCallbackUrl(): string {
 
 /**
  * Navigate to an Amber nostrsigner: URL.
- * In Capacitor WebViews, window.location.href causes a "malformed request"
- * error because the WebView tries to navigate instead of firing an intent.
- * Use window.open() with _system target to hand off to Android properly.
+ *
+ * Use window.location.href for all platforms — Android handles the
+ * nostrsigner: custom scheme via intent-filter regardless of whether
+ * we're in a WebView or browser. window.open(_system) was stripping
+ * query parameters causing Amber to receive a malformed request.
  */
 function openAmberUrl(url: string): void {
-  // Capacitor / Android WebView: use _system to fire the intent
-  const isCapacitor = !!(window as unknown as { Capacitor?: { isNativePlatform?: () => boolean } }).Capacitor?.isNativePlatform?.();
-  if (isCapacitor) {
-    window.open(url, '_system');
-  } else {
-    window.location.href = url;
-  }
+  window.location.href = url;
 }
 
 /**