diff --git a/browser/themes/gnomestripe/browser/browser.css b/browser/themes/gnomestripe/browser/browser.css
index 65ff556485d..edc0b725d6e 100644
--- a/browser/themes/gnomestripe/browser/browser.css
+++ b/browser/themes/gnomestripe/browser/browser.css
@@ -1904,6 +1904,16 @@ panel[dimmed="true"] {
 
 #status-bar {
   min-height: 0;
+  -moz-appearance: none;
+  background-color: transparent;
+  border: none;
+}
+
+#addon-bar[customizing] > #status-bar {
+  opacity: .5;
+  background-image: -moz-repeating-linear-gradient(-45deg,
+                                                   rgba(255,255,255,.3), rgba(255,255,255,.3) 5px,
+                                                   rgba(0,0,0,.3) 5px, rgba(0,0,0,.3) 10px);
 }
 
 #status-bar > statusbarpanel {
diff --git a/browser/themes/pinstripe/browser/browser.css b/browser/themes/pinstripe/browser/browser.css
index bdb98e1e525..f0d20a85d82 100644
--- a/browser/themes/pinstripe/browser/browser.css
+++ b/browser/themes/pinstripe/browser/browser.css
@@ -2469,6 +2469,13 @@ panel[dimmed="true"] {
   padding-right: 0;
 }
 
+#addon-bar[customizing] > #status-bar {
+  opacity: .5;
+  background-image: -moz-repeating-linear-gradient(-45deg,
+                                                   rgba(255,255,255,.3), rgba(255,255,255,.3) 5px,
+                                                   rgba(0,0,0,.3) 5px, rgba(0,0,0,.3) 10px);
+}
+
 #status-bar > statusbarpanel {
   border-width: 0;
   -moz-appearance: none;
diff --git a/browser/themes/winstripe/browser/browser.css b/browser/themes/winstripe/browser/browser.css
index 9092fed5a0c..8679968da42 100644
--- a/browser/themes/winstripe/browser/browser.css
+++ b/browser/themes/winstripe/browser/browser.css
@@ -2568,6 +2568,13 @@ panel[dimmed="true"] {
   min-height: 0;
 }
 
+#addon-bar[customizing] > #status-bar {
+  opacity: .5;
+  background-image: -moz-repeating-linear-gradient(-45deg,
+                                                   rgba(255,255,255,.3), rgba(255,255,255,.3) 5px,
+                                                   rgba(0,0,0,.3) 5px, rgba(0,0,0,.3) 10px);
+}
+
 #status-bar > statusbarpanel {
   border-width: 0;
   -moz-appearance: none;