diff --git a/browser/themes/shared/tabs.inc.css b/browser/themes/shared/tabs.inc.css
index ea19a060b82c..1b4d7279c778 100644
--- a/browser/themes/shared/tabs.inc.css
+++ b/browser/themes/shared/tabs.inc.css
@@ -245,7 +245,6 @@
   background-image: url(chrome://browser/skin/tabbrowser/tab-overflow-indicator.png);
   background-size: 100% 100%;
   width: 19px;
-  margin-bottom: var(--tab-toolbar-navbar-overlap);
   pointer-events: none;
   position: relative;
   z-index: 3; /* the selected tab's z-index + 1 */