Hello,

Was it working before and now it's not smooth? If yes, please contact me to my support e-mail.
Anyway I've removed the options for smooth control because the scrolling is now controlled automatically based on your screen refresh rate - this is the right way to do it.
However on complex pages, your Firefox may just not be fast enough - to be really smooth it needs to move the page 60 times per second, which is a lot (even for Chrome).

I'm not sure there is anything I can do about it, but the good news is that as Firefox gets faster, the problem will go away :)

Best regards,
Juraj Mäsiar