diff --git a/chrome/content/zotero/actors/ActorManager.jsm b/chrome/content/zotero/actors/ActorManager.jsm
index d521a4030d..18ff7e3f73 100644
--- a/chrome/content/zotero/actors/ActorManager.jsm
+++ b/chrome/content/zotero/actors/ActorManager.jsm
@@ -1,5 +1,8 @@
 var EXPORTED_SYMBOLS = [];
 
+// Register Mozilla actors
+ChromeUtils.importESModule("resource://gre/modules/ActorManagerParent.sys.mjs");
+
 ChromeUtils.registerWindowActor("PageData", {
 	child: {
 		moduleURI: "chrome://zotero/content/actors/PageDataChild.jsm"
diff --git a/scss/components/_mainWindow.scss b/scss/components/_mainWindow.scss
index 8df2a95c87..1c31eba08d 100644
--- a/scss/components/_mainWindow.scss
+++ b/scss/components/_mainWindow.scss
@@ -1,4 +1,4 @@
-:is(panel)::part(content) {
+:is(panel):not(#autoscroller)::part(content) {
 	--panel-background: var(--material-toolbar);
 }
 
diff --git a/scss/win/_menupopup.scss b/scss/win/_menupopup.scss
index 4d75642522..15cebcf361 100644
--- a/scss/win/_menupopup.scss
+++ b/scss/win/_menupopup.scss
@@ -1,4 +1,4 @@
-menupopup, panel, #search-mode-popup {
+menupopup, panel:not(#autoscroller), #search-mode-popup {
 	--panel-border-radius: 8px;
 	--panel-background: var(--material-toolbar);
 	--menuitem-hover-background-color: var(--fill-quinary);