Created attachment 158961 [details]
lsusb screenshot.

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***

KDE Neon provides Firefox with own APT repository, with pre-installed state. However, preinstalled Firefox does not support USB security keys like YubiKey 5.

STEPS TO REPRODUCE
1. Run pre-installed Firefox
2. Go to https://webauthnsample.azurewebsites.net/
3. Click Register or Authenticate button below. 

OR if you are worrying about security issues: Try GitHub login process with security key enabled account.


OBSERVED RESULT
You can see a pop-up near by the address bar, but it quickly disappeared.

EXPECTED RESULT
A pop-up that asks you to insert security key or enter PIN code to continue appeared under the address bar.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon 5.27(Based on Ubuntu 22.04 LTS), KDE Plasma 5.27.5
(available in About System)
KDE Plasma Version: 5.27.5
KDE Frameworks Version:  5.105.0
Qt Version: 5.15.9
Kernel Version: 5.19.0-41-generic (64Bit)
Graphic Platform: X11, Wayland (Both platform shows same error)

ADDITIONAL INFORMATION
- Firefox installed with Flatpak(from flathub) works well with security keys, but frequently crashed without crash report and not working with KIME (one of linux Korean IME)
- Firefox installed with snap works well with security keys, but it does not support preinstalled CJK fonts.
- Chromium installed with Flatpak works well with security keys.
- Firefox Nightly(firefox-trunk package) installed by APT PPA(https://launchpad.net/~ubuntu-mozilla-daily/+archive/ubuntu/ppa) does not work with security keys.
- YubiKey Manager (CLI, installed with APT PPA by Yubico) detects YubiKey inserted.
- lsusb shows YubiKey inserted in this laptop.

- Firefox Nightly installed on Kubuntu 22.04, installed with snap works very well. However, it was tested three months ago.