Hi @janbletz

This indeed looks odd! We run some tests and I think we were able to fix the problem, and I’m no longer able to reproduce the issue on my test site.

I’ve uploaded a new version here for you:
https://www.dropbox.com/s/9ne6r2mrog3q3w5/smart-slider3-wordpress-free-firefox.zip?dl=1

Can you try and see if it solves your problem, too?

To be able to install this new version, should go to your Plugins list, delete your current Smart Slider 3 (don’t worry, your sliders will stay) and install the zip like this:
https://smartslider.helpscoutdocs.com/article/1717-wordpress-installation

Please let me know how it goes!

Hi,

Great news! We’ll put this fix to the next release!