From 035a03fdf2af7a1eaabf3e8dcceed4107b049973 Mon Sep 17 00:00:00 2001
From: Abe Jellinek <jellinek@berkeley.edu>
Date: Wed, 8 Oct 2025 10:18:29 -0400
Subject: [PATCH] Item pane header: Only pre-cache CSL.Engine if set to
 bibEntry mode

---
 chrome/content/zotero/elements/itemPaneHeader.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/chrome/content/zotero/elements/itemPaneHeader.js b/chrome/content/zotero/elements/itemPaneHeader.js
index 39494fb57b..32fd23ea3d 100644
--- a/chrome/content/zotero/elements/itemPaneHeader.js
+++ b/chrome/content/zotero/elements/itemPaneHeader.js
@@ -83,7 +83,9 @@
 			];
 			
 			this._bibEntryCache = new LRUCache();
-			this._cacheCSLEngine();
+			if (Zotero.Prefs.get(PREF_HEADER_MODE) === 'bibEntry') {
+				this._cacheCSLEngine();
+			}
 			
 			this.title = this.querySelector('.title');
 			this.titleField = this.title.querySelector('editable-text');