If you’ve updated wayland package to 1.22, you might’ve noticed that neither Firefox nor Thunderbird starts now.
As a remedy, try to downgrade wayland package to 1.21. Alternatively, build mesa from source code, so you have egl/wayland: Fix destruction of event queue with proxies still attached. (!21646) · Merge requests · Mesa / mesa · GitLab
Mozilla bug report to track the crash: 1826583 - [wayland-1.22] Crash in [@ libwayland-client.so.0@0x6c9d]: "warning: queue 0x7f0821b867c0 destroyed while proxies still attached:"