From 9bc0a4ca927cce03900edb0541e052b72c4266d1 Mon Sep 17 00:00:00 2001
From: Andrey Bochkarev <50177704+octaviusz@users.noreply.github.com>
Date: Sat, 28 Feb 2026 21:38:32 +0300
Subject: [PATCH] refactor: Simplify new tab handling in collapsed live
 folders, p=#12552

---
 src/zen/folders/ZenFolder.mjs | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/src/zen/folders/ZenFolder.mjs b/src/zen/folders/ZenFolder.mjs
index 98c9b3f23..992a8c9c2 100644
--- a/src/zen/folders/ZenFolder.mjs
+++ b/src/zen/folders/ZenFolder.mjs
@@ -281,18 +281,10 @@ export class nsZenFolder extends MozTabbrowserTabGroup {
   addTabs(tabs) {
     super.addTabs(tabs);
     if (this.collapsed && !gZenFolders._sessionRestoring && this.isLiveFolder && tabs.length) {
-      let activeTabs = this.activeTabs;
-      activeTabs.push(...tabs);
-      gZenFolders._dontAnimateFolder = true;
-      gZenFolders.on_TabGroupExpand({ target: this }).then(() => {
-        for (let tab of activeTabs) {
-          tab.setAttribute("folder-active", "true");
-        }
-        gZenFolders.on_TabGroupCollapse({ target: this }).then(() => {
-          delete gZenFolders._dontAnimateFolder;
-          gBrowser.tabContainer._invalidateCachedVisibleTabs();
-        });
+      tabs.forEach((tab) => {
+        tab.setAttribute("folder-active", "true");
       });
+      gZenFolders.animateCollapse(this);
     }
   }