[Theme Horse Support Team]

hi smudger59,
I think you have customize the code ? I found that search is also not working and the hover of sub menu too is also not working. We recommended not to change the code. I found that the slider is not working on Chrome also and too Firefox. This theme works great you can see to our demo site if there works fine there in your site too it must work fine.
https://www.themehorse.com/preview/interface/

Thank you!