JS minification issue with Firefox

Dear Team,

My website is http://www.travelsmart.bg

When I have the JS minification switched on, on Firefox the meta slider that I have under my menu does not appear. When I switch the JS minification off it appears.

Could you please advise on what I should do to have both of them working and appearing?

Thank you!
Best,
Martin

https://ww.wp.xz.cn/plugins/w3-total-cache/