Background dismiss doesn't work in Firefox at craftpip.github.io/jquery-confirm

[ghost]

jquery-confirm version: v3.3.4

I'm submitting a ... (check one with "x") [X ] bug report [ ] feature request [ ] support request

Current behavior: Background dismiss doesn't work in FF 100

Expected behavior: Pop up should shake and not close, then you check "Enable backgroundDismiss" and the pop up should be closed if clicked on background overlay

Steps to reproduce: Use FF 100, follow https://craftpip.github.io/jquery-confirm/#backgrounddismiss, try the example

Other information: Can Grammarly influence this?