Test your site in all browsers
 

.. can be done here, https://saucelabs.com
I used it a few times and it saved me a lot of hours of work
Thought I drop the tip before I knock off to sleep

Add this tool to your Foxtab

Your signature has a typo.

its the SIMPLE SIMPLY thing he, Dutch crossing English issue
Thanks for the heads up

stop posting webmastering tips in a conspiracy and current events/politics forum :mad::mad::mad: mods please ban this guy

its better to check in the real browser, just install them on your pc. Javascripts and css are handled differently and that website doesnt take care of that.