diff --git a/Compatibility-Issues-Solution.md b/Compatibility-Issues-Solution.md
index c7b85cf..d04bac0 100644
--- a/Compatibility-Issues-Solution.md
+++ b/Compatibility-Issues-Solution.md
@@ -11,7 +11,7 @@ https://github.com/black7375/Firefox-UI-Fix/blob/4948226abe1c93e716e6b690e6098ed
   }
 ```
 
-## Unselected Tab Separators
+## Unselected Tab Separators - Color
 
 Try to change `background-color` [#4](https://github.com/black7375/Firefox-UI-Fix/issues/4)
 
@@ -22,8 +22,21 @@ Try to change `background-color` [#4](https://github.com/black7375/Firefox-UI-Fi
   /** Unselected Tab - Divide line ********************************************/
   .tab-content::before,
   .tab-content::after {
-  /*codes*/
-  background-color: var(--toolbarseparator-color) !important;
-  /*codes*/
+    /*codes*/
+    background-color: var(--toolbarseparator-color) !important;
+    /*codes*/
+  }
+```
+
+## Unselected Tab Separators - Don't show
+
+Try to add `box-shadow`
+
+```css
+  /** Unselected Tab - Divide line ********************************************/
+  .tab-content::before,
+  .tab-content::after {
+    /*codes*/
+    box-shadow: 0 0 1px 0 color-mix(in srgb, currentColor 60%, transparent);
   }
 ```
\ No newline at end of file