lets see what this does?

zuss/app.js

@@ -4,7 +4,7 @@
  * - Install/Update Overlay mit beforeinstallprompt.prompt()
  */
 
-const APP_VERSION = "2025.12.24.9";
+const APP_VERSION = "2025.12.24.10";
 const TOKEN = "T9e7WESBXxy6rSD";
 const BASE = "https://home.x-s.at";
 const SHARE_DAV = `${BASE}/public.php/dav/files/${TOKEN}`;
@@ -258,7 +258,6 @@ function renderList(items, currentDir) {
     a.href = "#";
     a.addEventListener("click", (e) => {
       e.preventDefault();
-
       // Build relative path within share
       // href includes /public.php/dav/files/<token>/...; we want path after that
       const marker = `/public.php/dav/files/${TOKEN}`;
@@ -266,8 +265,13 @@ function renderList(items, currentDir) {
       let rel = "/";
       if (idx >= 0) rel = it.href.slice(idx + marker.length);
       if (!rel.startsWith("/")) rel = "/" + rel;
-
-      window.location.href = toPdfJsUrl(rel);
+      const targetUrl = toPdfJsUrl(rel);
+      // Open in new tab so closing the PDF returns to the list, not back navigation
+      const win = window.open(targetUrl, "_blank", "noopener,noreferrer");
+      if (!win) {
+        // fallback if blocked
+        window.location.href = targetUrl;
+      }
     });
 
     const ico = document.createElement("div");