From d8811a49d0adc6a04f6b025ad980ca676835b90c Mon Sep 17 00:00:00 2001
From: Fred Chasen <fchasen@gmail.com>
Date: Tue, 28 Nov 2023 17:43:26 +0000
Subject: [PATCH] Bug 1866870 - Check if gBrowser is available before updating
 Shopping Sidebar visibility. r=shopping-reviewers,Gijs

Checks if `gBrowser` is available in `updateSidebarVisibilityForWindow` to prevent errors when it is undefined (like on about:config).

Differential Revision: https://phabricator.services.mozilla.com/D194810
---
 browser/components/shopping/ShoppingSidebarParent.sys.mjs | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/browser/components/shopping/ShoppingSidebarParent.sys.mjs b/browser/components/shopping/ShoppingSidebarParent.sys.mjs
index efb1e3e2f4cb..374ccabb30ab 100644
--- a/browser/components/shopping/ShoppingSidebarParent.sys.mjs
+++ b/browser/components/shopping/ShoppingSidebarParent.sys.mjs
@@ -152,6 +152,10 @@ class ShoppingSidebarManagerClass {
       return;
     }
 
+    if (!window.gBrowser) {
+      return;
+    }
+
     let document = window.document;
 
     if (!this.isActive) {
@@ -322,10 +326,12 @@ class ShoppingSidebarManagerClass {
         if (!this.enabled) {
           return;
         }
+        let { gBrowser } = event.target.ownerGlobal.top;
+        if (!gBrowser) {
+          return;
+        }
         this.updateSidebarVisibilityForWindow(event.target.ownerGlobal.top);
-        this._updateBCActiveness(
-          event.target.ownerGlobal.top.gBrowser.selectedBrowser
-        );
+        this._updateBCActiveness(gBrowser.selectedBrowser);
       }
     }
   }
-- 
2.11.4.GIT