From f20132edb0b7d6a3517497caaa0cb6202d5483c4 Mon Sep 17 00:00:00 2001
From: wuggy <ownedbywuigi@gmail.com>
Date: Sat, 19 Sep 2026 04:21:19 -0700
Subject: [PATCH] Fix browser console errors

---
 browser/base/content/browser-places.js             |  4 ++--
 browser/base/content/tab-content.js                |  8 ++++++--
 .../components/internaluserscripts.js              | 14 +++++++++++---
 3 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/browser/base/content/browser-places.js b/browser/base/content/browser-places.js
index 9e472ad6e4..e2408aaf8f 100644
--- a/browser/base/content/browser-places.js
+++ b/browser/base/content/browser-places.js
@@ -1731,14 +1731,14 @@ var BookmarkingUI = {
     if (this._itemIds.length > 0) {
       this.broadcaster.setAttribute("starred", "true");
       this.broadcaster.setAttribute("buttontooltiptext", this._starredTooltip);
-      if (this.button.getAttribute("overflowedItem") == "true") {
+      if (this.button && this.button.getAttribute("overflowedItem") == "true") {
         this.button.setAttribute("label", this._starButtonOverflowedStarredLabel);
       }
     }
     else {
       this.broadcaster.removeAttribute("starred");
       this.broadcaster.setAttribute("buttontooltiptext", this._unstarredTooltip);
-      if (this.button.getAttribute("overflowedItem") == "true") {
+      if (this.button && this.button.getAttribute("overflowedItem") == "true") {
         this.button.setAttribute("label", this._starButtonOverflowedLabel);
       }
     }
diff --git a/browser/base/content/tab-content.js b/browser/base/content/tab-content.js
index fd4612cc4d..a7b62d753c 100644
--- a/browser/base/content/tab-content.js
+++ b/browser/base/content/tab-content.js
@@ -133,8 +133,12 @@ var AboutHomeListener = {
 
   onUpdate: function(aData) {
     let doc = content.document;
-    if (aData.showRestoreLastSession && !PrivateBrowsingUtils.isContentWindowPrivate(content))
-      doc.getElementById("launcher").setAttribute("session", "true");
+    if (aData.showRestoreLastSession && !PrivateBrowsingUtils.isContentWindowPrivate(content)) {
+      let launcher = doc.getElementById("launcher");
+      if (launcher) {
+        launcher.setAttribute("session", "true");
+      }
+    }
 
     // Inject search engine URL.
     let docElt = doc.documentElement;
diff --git a/browser/internaluserscripts/components/internaluserscripts.js b/browser/internaluserscripts/components/internaluserscripts.js
index 8876acaac7..7469ed2e26 100644
--- a/browser/internaluserscripts/components/internaluserscripts.js
+++ b/browser/internaluserscripts/components/internaluserscripts.js
@@ -106,9 +106,17 @@ InternalUserscriptsService.prototype = {
 
     // The codec shim is deliberately limited to YouTube.  Use the browser's
     // decoder probe rather than guessing from the user's graphics settings.
-    if (documentURI &&
-        documentURI.host &&
-        /(^|\.)youtube(?:-nocookie)?\.com$/i.test(documentURI.host)) {
+    let documentHost = null;
+    try {
+      // nsIURI.host is not implemented by hostless URI schemes (about:, data:,
+      // moz-extension:, and others), so reading it can throw.
+      if (documentURI) {
+        documentHost = documentURI.host;
+      }
+    } catch (e) {}
+
+    if (documentHost &&
+        /(^|\.)youtube(?:-nocookie)?\.com$/i.test(documentHost)) {
       let settings = {
         hideUnaccelerated: Services.prefs.getBoolPref(
           "browser.video.youtube.hide-unaccelerated", true),