Use the headless mode for FireFox

johansmitsnl · johansmitsnl · commit f7d1dd25d128 · 2018-08-07T22:27:03.000+02:00
https://docs.travis-ci.com/user/gui-and-headless-browsers/#using-the-firefox-addon-in-headless-mode
diff --git a/.travis.yml b/.travis.yml
@@ -6,7 +6,8 @@ rvm:
   - ruby-head
 env:
   - DRIVER=google-chrome TZ=Europe/Berlin
-  - DRIVER=firefox TZ=Europe/Berlin
+  - DRIVER=firefox TZ=Europe/Berlin MOZ_HEADLESS=1
+
 matrix:
     fast_finish: true
     allow_failures:
