Ionic core (v4) slides not working in Firefox?

Could someone give a try to the following codepen? I’v build this simple example to test the slides using only @ionic/core. Result: for me, it works fine in Safari and Chrome but the slides aren’t swipable in Firefox

Are you able to swipe them in Firefox? If no, do you see something I’m doing wrong or do you think it’s a bug? If bug, Ionic, Firefox or Swiper?

Thx in advance for the feedbacks!

P.S.: Funny thing, in my app, with Ionic v4 Angular v6, the slides just work fine in Firefox too

I think it’s probably a dumb question :wink: Custom Elements in Firefox < v63 aren’t supported

A workaround is to add a polyfill