Bug 584006 - Drop non-native style for the Add-ons manager utilities button. r=bmcbride a=blocking

toolkit/themes/gnomestripe/mozapps/extensions/extensions.css

@@ -260,30 +260,13 @@
 }
 
 #header-utils-btn {
-  -moz-appearance: none;
   min-width: 4.5em;
-  border-width: 1px;
-  -moz-border-top-colors: #999;
-  -moz-border-bottom-colors: #999;
-  -moz-border-left-colors: #999;
-  -moz-border-right-colors: #999;
-  -moz-border-radius: 8px;
-  background-image: -moz-linear-gradient(#FFF, #BBB);
+}
+
+#header-utils-btn .button-icon {
   list-style-image: url("chrome://mozapps/skin/extensions/utilities.png");
 }
 
-#header-utils-btn:hover,
-#header-utils-btn[open="true"] {
-  -moz-border-top-colors: #777;
-  -moz-border-bottom-colors: #777;
-  -moz-border-left-colors: #777;
-  -moz-border-right-colors: #777;
-}
-
-#header-utils-btn[open="true"] {
-  -moz-box-shadow: inset 3px 3px 8px #555;
-}
-
 #header-utils-btn:-moz-focusring > .button-box {
   border: none;
 }