Updated browsers for CI and local testing

Author: JamesMessinger

karma.conf.js

@@ -13,8 +13,8 @@ module.exports = karmaConfig({
   browsers: {
     chrome: host.ci ? host.os.linux : true,
     firefox: host.ci ? host.os.linux : true,
-    safari: host.ci ? host.os.linux : host.os.mac,
-    edge: host.ci ? host.os.linux : host.os.windows,
-    ie: host.os.windows,
+    safari: host.ci ? host.os.linux : host.os.mac,    // SauceLabs in CI
+    edge: host.ci ? host.os.linux : host.os.windows,  // SauceLabs in CI
+    ie: host.ci ? host.os.windows : false,  // IE needs to run by itself, due to Babel transforms
   },
 });