From 278580ea43a36fc9f54b21248f839844c0bca577 Mon Sep 17 00:00:00 2001
From: "mr. m" <91018726+mr-cheffy@users.noreply.github.com>
Date: Fri, 17 Jul 2026 17:08:15 +0200
Subject: [PATCH] gh-14616: Fixed add to essentials being disabled (gh-14631)

---
 src/zen/tabs/ZenPinnedTabManager.mjs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/zen/tabs/ZenPinnedTabManager.mjs b/src/zen/tabs/ZenPinnedTabManager.mjs
index b75224925..40f25ab85 100644
--- a/src/zen/tabs/ZenPinnedTabManager.mjs
+++ b/src/zen/tabs/ZenPinnedTabManager.mjs
@@ -837,7 +837,7 @@ class nsZenPinnedTabManager extends nsZenDOMOperatedFeature {
         if (essentialTabsTarget) {
           if (gZenWorkspaces.containerSpecificEssentials) {
             const targetContainerId =
-              gZenWorkspaces.getActiveWorkspaceFromCache().containerTabId;
+              gZenWorkspaces.getActiveWorkspaceFromCache().containerTabId || 0;
             const sameContextId =
               (tab.getAttribute("usercontextid") || 0) == targetContainerId;
             if (!sameContextId && tab.hasAttribute("zen-essential")) {
@@ -1022,7 +1022,7 @@ class nsZenPinnedTabManager extends nsZenDOMOperatedFeature {
     return (
       !(
         (tab.getAttribute("usercontextid") || 0) !=
-          gZenWorkspaces.getActiveWorkspaceFromCache().containerTabId &&
+          (gZenWorkspaces.getActiveWorkspaceFromCache().containerTabId || 0) &&
         gZenWorkspaces.containerSpecificEssentials
       ) && gBrowser._numZenEssentials < this.maxEssentialTabs
     );