diff --git a/browser/themes/pinstripe/browser/tabcandy/tabcandy.css b/browser/themes/pinstripe/browser/tabcandy/tabcandy.css
index 4731f3f710bc..db47e231ab4c 100644
--- a/browser/themes/pinstripe/browser/tabcandy/tabcandy.css
+++ b/browser/themes/pinstripe/browser/tabcandy/tabcandy.css
@@ -196,8 +196,11 @@ body {
 .guideTrench {
   z-index: -101;
   opacity: 0.9;
-  border-top: 2px solid rgba(0,0,0,0.13);
-  border-left: 2px solid rgba(0,0,0,0.13);
+  border: 1px dashed  rgba(0,0,0,.08);
+  border-bottom: none;
+  border-right: none;
+  -moz-box-shadow: 1px 1px 0 rgba(255,255,255,.1);
+  
 }
 
 .visibleTrench {