diff --git a/other/firefox/WhiteSur/parts/tabsbar.css b/other/firefox/WhiteSur/parts/tabsbar.css
index fa5268ba..0e8ec06a 100644
--- a/other/firefox/WhiteSur/parts/tabsbar.css
+++ b/other/firefox/WhiteSur/parts/tabsbar.css
@@ -262,6 +262,11 @@
 		border: none !important;
 	}
 
+	.toolbarbutton-1 + .toolbarbutton-1,
+	#tabbrowser-tabs + .toolbarbutton-1 {
+		border-left: 1px solid var(--gnome-tabbar-tab-border-color) !important;
+	}
+
 	.toolbarbutton-1 > .toolbarbutton-icon,
 	.toolbarbutton-1 > .toolbarbutton-text,
 	.toolbarbutton-1 > .toolbarbutton-badge-stack {
diff --git a/other/firefox/common/parts/popups.css b/other/firefox/common/parts/popups.css
index 0471f45c..7a83fb16 100644
--- a/other/firefox/common/parts/popups.css
+++ b/other/firefox/common/parts/popups.css
@@ -151,7 +151,7 @@ panelview {
 }
 
 .panel-header {
-	padding: 0 0 10px 0 !important;
+	padding-bottom: 10px !important;
 }
 .panel-header + toolbarseparator,
 #identity-popup-mainView-panel-header + toolbarseparator,