Use selenium beta4 so firefox works.

Author: heathkit

circle.yml

@@ -14,8 +14,9 @@ dependencies:
   post:
     - ./node_modules/.bin/gulp lint
     - ./node_modules/.bin/webdriver-manager update
-    - ./node_modules/.bin/webdriver-manager start:
-          background: true
+    - wget http://selenium-release.storage.googleapis.com/3.0-beta4/selenium-server-standalone-3.0.0-beta4.jar -P ./node_modules/webdriver-manager/selenium
+    - ./node_modules/.bin/webdriver-manager start --versions.standalone 3.0.0-beta4:
+        background: true
     - cd testapp && npm update
     - npm start:
           background: true