From a8e245b28a01edf352619b25278224211ddca567 Mon Sep 17 00:00:00 2001
From: "mr. m" <mr.m@tuta.com>
Date: Thu, 19 Feb 2026 00:50:11 +0100
Subject: [PATCH] feat: Listen for tabHide and tabShow events for window sync,
 b=bug #12408, c=no-component

---
 src/zen/sessionstore/ZenWindowSync.sys.mjs | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/zen/sessionstore/ZenWindowSync.sys.mjs b/src/zen/sessionstore/ZenWindowSync.sys.mjs
index f825ef4e8..fd27cba8a 100644
--- a/src/zen/sessionstore/ZenWindowSync.sys.mjs
+++ b/src/zen/sessionstore/ZenWindowSync.sys.mjs
@@ -47,6 +47,9 @@ const EVENTS = [
   "TabGroupRemoved",
   "TabGroupMoved",
 
+  "TabHide",
+  "TabShow",
+
   "ZenTabRemovedFromSplit",
   "ZenSplitViewTabsSplit",
 
@@ -1167,6 +1170,34 @@ class nsZenWindowSync {
     return this.#delegateGenericSyncEvent(aEvent, SYNC_FLAG_LABEL);
   }
 
+  on_TabHide(aEvent) {
+    const tab = aEvent.target;
+    const window = tab.ownerGlobal;
+    if (lazy.gSyncOnlyPinnedTabs && !tab.pinned) {
+      return;
+    }
+    this.#runOnAllWindows(window, (win) => {
+      const targetTab = this.getItemFromWindow(win, tab.id);
+      if (targetTab) {
+        targetTab.ownerGlobal.gBrowser.hideTab(targetTab);
+      }
+    });
+  }
+
+  on_TabShow(aEvent) {
+    const tab = aEvent.target;
+    const window = tab.ownerGlobal;
+    if (lazy.gSyncOnlyPinnedTabs && !tab.pinned) {
+      return;
+    }
+    this.#runOnAllWindows(window, (win) => {
+      const targetTab = this.getItemFromWindow(win, tab.id);
+      if (targetTab) {
+        targetTab.ownerGlobal.gBrowser.showTab(targetTab);
+      }
+    });
+  }
+
   on_TabMove(aEvent) {
     this.#delegateGenericSyncEvent(aEvent, SYNC_FLAG_MOVE);
     return Promise.resolve();