Thanks for your fast help!
Tested the optimize image option and the disabled blur, now its smooth!
i think i should do the blur directly on the images.
have a nice day!
maybe you can see what i mean on the screen video.
left is chrome, right is firefox
its an wetransfer link
https://we.tl/t-s2MyIEZ6Ga
I’m using Firefox Quantum 69.0 (64-Bit) and mac os mojave (10.14.6)
The slider is very rough and the transitions are not smooth. I am surprised that you can not see it. the customer as well as others who tested it, have confirmed my view. Hope you can help