diff --git a/src/other/firefox/WhiteSur/parts/toolbox.css b/src/other/firefox/WhiteSur/parts/toolbox.css
index 5126b86b..45107c3c 100644
--- a/src/other/firefox/WhiteSur/parts/toolbox.css
+++ b/src/other/firefox/WhiteSur/parts/toolbox.css
@@ -119,12 +119,18 @@ findbar:-moz-window-inactive label,
 }
 
 /* Sidebar */
-#sidebar-box,
+#sidebar-box, #sidebar,
 .sidebar-panel[lwt-sidebar] {
 	color: var(--gnome-toolbar-color) !important;
 	background: var(--gnome-toolbar-background) !important;
 }
 
+.sidebar-splitter {
+	width: 1px !important;
+	background-color: var(--gnome-toolbar-border-color) !important;
+	border: none !important;
+}
+
 /* Customization page */
 #customization-container:-moz-lwtheme {
 	background-image: linear-gradient(var(--gnome-browser-before-load-background), var(--gnome-browser-before-load-background)) !important;
diff --git a/src/other/firefox/common/parts/popups.css b/src/other/firefox/common/parts/popups.css
index a4341227..51353733 100644
--- a/src/other/firefox/common/parts/popups.css
+++ b/src/other/firefox/common/parts/popups.css
@@ -186,6 +186,10 @@ menuitem, menupopup menu,
 	min-height: 28px !important;
 }
 
+.toolbar-menupopup :is(menu, menuitem) {
+	margin: 0 !important;
+}
+
 .subviewbutton,
 .protections-popup-footer-button,
 .protections-popup-category,