When the homepage energetisch.fit is accessed, the collum is moved as soon as it is scrolled, the text block is in the correct position. This problem is only shown with Firefox - in Chrome it is displayed correctly.
Firefox 55.03 64 bit macOS Sierra 10.12.6
Screen:
https://www.screencast.com/t/AkHvn5hd
Video:
https://www.screencast.com/t/022AlZJn7E9
Thank you
