From 79d3d6a9936cd3dc9cb961647cb82e63ec564333 Mon Sep 17 00:00:00 2001
From: Ashvin Jangid <142579833+ashvwinn@users.noreply.github.com>
Date: Sun, 5 Jul 2026 16:15:07 +0530
Subject: [PATCH] gh-14460: prevent nested glance tabs (gh-14480)

Co-authored-by: mr. m <91018726+mr-cheffy@users.noreply.github.com>
Signed-off-by: mr. m <91018726+mr-cheffy@users.noreply.github.com>
---
 src/zen/glance/ZenGlanceManager.mjs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/zen/glance/ZenGlanceManager.mjs b/src/zen/glance/ZenGlanceManager.mjs
index c5f503059..4db6e72fd 100644
--- a/src/zen/glance/ZenGlanceManager.mjs
+++ b/src/zen/glance/ZenGlanceManager.mjs
@@ -1551,6 +1551,7 @@ class nsZenGlanceManager extends nsZenDOMOperatedFeature {
     return (
       owner &&
       owner.pinned &&
+      !owner.hasAttribute("glance-id") &&
       this._lazyPref.SHOULD_OPEN_EXTERNAL_TABS_IN_GLANCE &&
       owner.linkedBrowser?.browsingContext?.isAppTab &&
       this.tabDomainsDiffer(owner, uri) &&