More 100706 fun. The <tabbrowser> widget. r/sr=jst,jag

themes/classic/navigator/tabbrowser.css

@@ -0,0 +1,6 @@
+
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+tab[busy] {
+  list-style-image: url("chrome://global/skin/loading.gif");
+}

themes/modern/navigator/tabbrowser.css

@@ -0,0 +1,6 @@
+
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+tab[busy] {
+  list-style-image: url("chrome://communicator/skin/icons/loading.gif");
+}