diff --git a/src/browser/themes/shared/zen-sidebar.css b/src/browser/themes/shared/zen-sidebar.css
index d2f078aaf..e68bbb73f 100644
--- a/src/browser/themes/shared/zen-sidebar.css
+++ b/src/browser/themes/shared/zen-sidebar.css
@@ -7,20 +7,15 @@
 }
 
 #sidebar-box {
-  --zen-sidebar-box-border-radius: var(--zen-appcontent-border-radius);
-  margin: var(--zen-appcontent-separator-from-window) !important;
+  --zen-sidebar-box-border-radius: var(--zen-browser-border-radius);  
+  margin: 10px !important;
   border-radius: var(--zen-sidebar-box-border-radius) !important;
   overflow: hidden;
   transition: .2s;
   margin-left: 0 !important;
-  border: var(--zen-appcontent-border);
-}
-
-#sidebar-box:not([positionend="true"]) {
-  border-top-left-radius: 0px !important;
-  border-bottom-left-radius: 0px !important;
   margin-right: 0 !important;
-}
+  border: var(--zen-appcontent-border);
+}   
 
 #sidebar-box[hidden="true"] {
   width: 0 !important;
@@ -28,8 +23,6 @@
 }
 
 #zen-main-app-wrapper:has(#sidebar-box:not([hidden="true"], [positionend="true"])) #TabsToolbar {
-  border-top-right-radius: 0 !important;
-  border-bottom-right-radius: 0 !important;
   margin-right: 0 !important;
   box-shadow: none !important;
 }
@@ -39,7 +32,7 @@
   background: transparent !important;  
   border-color: transparent !important;
   width: 1px !important;
-  background-color: -moz-dialog !important;
+  margin-right: 5px !important   ;
 }
 
 #sidebar-box[positionend] {