Navbbar not working in Firefox

Hey there,

I just finished a Webflow Project but now the client has told me, that the navigation bar does not work in Firefox. I tested it and he is right. The Navbar works fine in Chrome and Safari but does not even change the cursor when hovering over it and is not clickable in Firefox.
I already tried to set the z-index higher, but it did not change anything.

Does someone else experience this issue and knows the answer?

I would be glad for any help! Thank you in advance :slight_smile:

Here is the read-only link:

Here is the live-site: