From d1681f155c202e5f988acb98f939fa452a988a07 Mon Sep 17 00:00:00 2001
From: Til Schmitter <til.schmitter@gmail.com>
Date: Mon, 11 May 2026 19:21:09 +0200
Subject: [PATCH] limit extension check logic for thumbnails if length >= 3

---
 copyparty/web/browser.js | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index 83cf9eb6..202c0705 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -6454,12 +6454,13 @@ window.thegrid = (function () {
 
 				ar.reverse();
 				ext0 = ar[0];
-				for (var b = 0; b < Math.min(2, ar.length); b++) {
-					if (ar[b].length > 7)
-						break;
+				if(ext0.length < 3)
+					for (var b = 0; b < Math.min(2, ar.length); b++) {
+						if (ar[b].length > 7)
+							break;
 
-					ext = ext ? (ar[b] + '.' + ext) : ar[b];
-				}
+						ext = ext ? (ar[b] + '.' + ext) : ar[b];
+					}
 				if (!ext)
 					ext = 'unk';
 			}