diff --git a/frontend/src/components/ui/PdfDragButton.tsx b/frontend/src/components/ui/PdfDragButton.tsx
index 5b5153a0..f7dfbd03 100644
--- a/frontend/src/components/ui/PdfDragButton.tsx
+++ b/frontend/src/components/ui/PdfDragButton.tsx
@@ -1,4 +1,4 @@
-import { GripVertical, FileDown } from 'lucide-react';
+import { GripVertical, FileDown, Info } from 'lucide-react';
 import { fileUrl } from '../../utils/fileUrl';
 
 /**
@@ -81,16 +81,24 @@ export default function PdfDragButton({
   const iconSize = size === 'sm' ? 'w-3.5 h-3.5' : 'w-4 h-4';
 
   return (
-    <span
-      draggable
-      onDragStart={handleDragStart}
-      onClick={() => window.open(fileUrl(path, { inline: true }), '_blank', 'noopener')}
-      title={title || 'In Outlook/Explorer ziehen (Chrome/Edge). Klick: im Tab öffnen.'}
-      className={`inline-flex items-center gap-1 cursor-grab active:cursor-grabbing select-none rounded border border-gray-200 bg-gray-50 px-1.5 py-0.5 text-xs text-gray-600 hover:text-blue-600 hover:border-blue-300 hover:bg-blue-50 transition-colors ${className}`}
-    >
-      <GripVertical className={`${iconSize} text-gray-400`} />
-      <FileDown className={iconSize} />
-      <span>{label}</span>
+    <span className={`inline-flex items-center gap-1 ${className}`}>
+      <span
+        draggable
+        onDragStart={handleDragStart}
+        onClick={() => window.open(fileUrl(path, { inline: true }), '_blank', 'noopener')}
+        title={title || 'In Outlook/Explorer ziehen (Chrome/Edge). Klick: im Tab öffnen.'}
+        className="inline-flex items-center gap-1 cursor-grab active:cursor-grabbing select-none rounded border border-gray-200 bg-gray-50 px-1.5 py-0.5 text-xs text-gray-600 hover:text-blue-600 hover:border-blue-300 hover:bg-blue-50 transition-colors"
+      >
+        <GripVertical className={`${iconSize} text-gray-400`} />
+        <FileDown className={iconSize} />
+        <span>{label}</span>
+      </span>
+      <span
+        className="inline-flex cursor-help text-gray-400"
+        title="Ziehen funktioniert nur in Chrome/Edge. In Firefox stattdessen anklicken, um das PDF zu öffnen."
+      >
+        <Info className={iconSize} />
+      </span>
     </span>
   );
 }