diff --git a/toolkit/mozapps/extensions/content/extensions.css b/toolkit/mozapps/extensions/content/extensions.css
index 68eab8ecc15..2d9f6e7315c 100644
--- a/toolkit/mozapps/extensions/content/extensions.css
+++ b/toolkit/mozapps/extensions/content/extensions.css
@@ -19,3 +19,11 @@ extension[itemType="theme"][state="downloading"] {
   width: 0px;
 }
 
+extension[availableUpdateURL="none"] .extension-install-button-box {
+  display: none;
+}
+
+.extension-install-button-box {
+  display: -moz-box;
+}
+
diff --git a/toolkit/themes/pinstripe/mozapps/extensions/extensions.css b/toolkit/themes/pinstripe/mozapps/extensions/extensions.css
index 272258c536d..615cffdefe3 100644
--- a/toolkit/themes/pinstripe/mozapps/extensions/extensions.css
+++ b/toolkit/themes/pinstripe/mozapps/extensions/extensions.css
@@ -203,3 +203,36 @@ extension[itemType="theme"] .extension-icon {
   -moz-border-radius: 3px;
 }
 
+extension[availableUpdateURL="none"] .extension-badge {
+  display: none;
+}
+
+extension[loading="true"] .extension-badge {
+  display: -moz-box;
+  width: 16px;
+  height: 16px;
+  margin-bottom: -3px;
+  -moz-margin-end: -2px;
+  list-style-image: url("chrome://global/skin/throbber/Throbber-small.gif") !important;
+}
+
+.extension-badge {
+  display: -moz-box;
+  width: 16px;
+  height: 16px;
+  margin-bottom: -3px;
+  -moz-margin-end: -2px;
+  list-style-image: url("chrome://mozapps/skin/update/update.png");
+  -moz-image-region: rect(0px 48px 16px 32px);
+}
+
+.extension-install-button-box {
+  margin: 0px;
+}
+
+.throbber {
+  width: 16px;
+  height: 16px;
+  list-style-image: url("chrome://global/skin/throbber/Throbber-small.gif") !important;
+}
+
diff --git a/toolkit/themes/winstripe/mozapps/extensions/extensions.css b/toolkit/themes/winstripe/mozapps/extensions/extensions.css
index 75f7eafdee1..2903172ff51 100644
--- a/toolkit/themes/winstripe/mozapps/extensions/extensions.css
+++ b/toolkit/themes/winstripe/mozapps/extensions/extensions.css
@@ -165,12 +165,7 @@ extension[loading="true"] .extension-badge {
   -moz-image-region: rect(0px 48px 16px 32px);
 }
 
-extension[availableUpdateURL="none"] .extension-install-button-box {
-  display: none;
-}
-
 .extension-install-button-box {
-  display: -moz-box;
   margin: 0px;
 }