diff --git a/browser/base/content/aboutDialog.css b/browser/base/content/aboutDialog.css
new file mode 100644
index 000000000000..a55b383c0c5d
--- /dev/null
+++ b/browser/base/content/aboutDialog.css
@@ -0,0 +1,63 @@
+ #aboutDialog {
+   padding: 0px 0px 10px 0px;
+ }
+
+ #clientBox {
+   background-image: url("chrome://browser/content/about.png");
+   background-repeat: no-repeat;
+   background-color: #FFFFFF;
+   padding-top: 203px;
+   color: #000000;
+ }
+
+ #brandName {
+   font-weight: bold; font-size: larger;
+ } 
+
+ #detailsBox {
+   padding: 8px 10px 10px 8px;
+ }
+
+ #userAgent {
+   margin: 3px 10px 3px 5px;
+   background-color: #FFFFFF;
+   color: #000000;
+   padding: 1px 0px 1px 3px;
+   -moz-appearance: none;
+   overflow: hidden;
+
+#ifdef XP_MACOSX
+   height: 3.8em;
+#else
+   height: 2.4em;
+#endif
+
+   border: none;
+ }
+
+ #groove {
+   margin-top: 0px;
+ }
+
+ #creditsIframe {
+   cursor: default;
+   -moz-user-select: none;
+ }
+
+ #version {
+   font-weight: bold;
+   color: #909090;
+   margin: 1em 0px 10px 17px;
+ }
+
+ #copyright {
+   margin: 0px 0px 3px 16px;
+ }
+ 
+ button[dlgtype="extra2"] {
+   margin-left: 13px;
+ }
+ 
+ button[dlgtype="accept"] {
+   margin-right: 13px;
+ }