Comment 6 for bug 1947746

I had exactly the same issue with latest Ledger Nano S Plus and I finally solved it: Prerequisites: Ledger Nano S Plus Firefox installed from snap

    DO lsusb -v and gather product id
    sudo vim /etc/udev/rules.d/70-snap.firefox.rule find the line with Ledger Blue + Nano S + Nano X

should look like this:

SUBSYSTEM=="hidraw", KERNEL=="hidraw*", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0000|0001|0004|0005|0015|1005|1015|4005|4015|5015", TAG+="snap_firefox_firefox"

what you need to do is append your new productId to the end of the attributes.

    sudo systemctl reload apparmor.service

Hope that it helps