Bug 1161307 - Add-on manager: move the focusring to the .scrollbox-innerbox. r=mossop

toolkit/themes/shared/extensions/extensions.inc.css

@@ -353,10 +353,18 @@
 .list {
   -moz-appearance: none;
   margin: 0;
-  border-color: transparent;
+  border-width: 0 !important;
   background-color: transparent;
 }
 
+.list > scrollbox > .scrollbox-innerbox {
+  border: 1px dotted transparent;
+}
+
+.list:-moz-focusring > scrollbox > .scrollbox-innerbox {
+  border-color: #0095dd;
+}
+
 .addon {
   color: #444;
   border-bottom: 1px solid #c1c1c1;