diff --git a/css/leptonChrome.css b/css/leptonChrome.css
index 54bcc39..40c7d50 100644
--- a/css/leptonChrome.css
+++ b/css/leptonChrome.css
@@ -6481,6 +6481,10 @@
     --tab-separator-position-x: 2.5px;
   }
 
+  #tabbrowser-arrowscrollbox-periphery {
+    position: relative;
+  }
+
   @supports -moz-bool-pref("userChrome.tab.newtab_button_like_tab") {
     #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox {
       position: absolute;
diff --git a/src/tab/unselected_tab/_dynamic_separator.scss b/src/tab/unselected_tab/_dynamic_separator.scss
index 3607965..c0a1a3a 100644
--- a/src/tab/unselected_tab/_dynamic_separator.scss
+++ b/src/tab/unselected_tab/_dynamic_separator.scss
@@ -35,6 +35,10 @@
   }
 }
 
+#tabbrowser-arrowscrollbox-periphery {
+  position: relative;
+}
+
 @include Option("userChrome.tab.newtab_button_like_tab") {
   #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox {
     position: absolute;