diff --git a/e2e_spec/desktop_spec.ts b/e2e_spec/desktop_spec.ts
index cb230e89..b07ec0c7 100644
--- a/e2e_spec/desktop_spec.ts
+++ b/e2e_spec/desktop_spec.ts
@@ -7,9 +7,15 @@ let browsers: string[] = require('./target_browsers')[os.type()];
 describe('desktop browser smoke tests', () => {
   browsers.forEach((browserName) => {
     it('should be able to boot up ' + browserName, (done) => {
+      let capabilities: any = null;
+      if (browserName == 'firefox') {
+        capabilities = {browserName: browserName, useMarionette: true};
+      } else {
+        capabilities = {browserName: browserName};
+      }
       let driver = new webdriver.Builder()
                        .usingServer('http://localhost:4444/wd/hub')
-                       .withCapabilities({browserName: browserName})
+                       .withCapabilities(capabilities)
                        .build();
       driver.get('http://localhost:4444/wd/hub/status')
           .then(() => {