Fix styling tests with Firefox

Disable checking the style in IE and Edge due to a missing `:any`
selector

test/unit/dir.html

@@ -143,9 +143,15 @@
         :host-context([dir="rtl"]) :-webkit-any(.foo1, .bar1) {
           border: 20px solid black;
         }
+        :host-context([dir="rtl"]) :-moz-any(.foo1, .bar1) {
+          border: 20px solid black;
+        }
         :dir(rtl) :-webkit-any(.foo2, .bar2) {
           border: 20px solid black;
         }
+        :dir(rtl) :-moz-any(.foo2, .bar2) {
+          border: 20px solid black;
+        }
       </style>
       <div id="normal">hello</div>
       <div id="target">am i red?</div>
@@ -284,8 +290,11 @@
         assertComputed(Polymer.dom(el).firstElementChild, '10px');
         assertComputed(el.$.other, '5px');
         assertComputed(el.$.nested, '4px');
-        assertComputed(el.$.anyfoo, '20px');
-        assertComputed(el.$.anybar, '20px');
+        // Edge and IE don't have a `:any()` selector
+        if (!navigator.userAgent.match(/(?:Edge|Trident)/)) {
+          assertComputed(el.$.anyfoo, '20px');
+          assertComputed(el.$.anybar, '20px');
+        }
       })
     });
   </script>