diff --git a/userChrome.css b/userChrome.css
index 24bc048..d3ec3b8 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -407,7 +407,6 @@
       --autocomplete-popup-hover-background: var(--win-button-hover-bgcolor) !important;
 
       /* Button Border Color */
-      --tab-line-color: var(--win-button-border) !important;
       --checkbox-border-color: var(--win-button-border) !important;
       --input-border-color: var(--win-button-border) !important;
       --autocomplete-popup-separator-color: var(--win-button-border) !important;
@@ -435,6 +434,7 @@
       --input-error-border-color: var(--win-error-color) !important;
 
       /* Others */
+      --tab-line-color: Highlight !important;
       --tab-selected-bgcolor: unset !important;
       --tabs-border-color: transparent !important;
       --checkbox-checked-border-color: transparent !important;