I just tested the case that you mentioned and there is no issue. Check that you have installed omniverse/firefox (or universe/librewolf), there aren't any prior configuration files in ~ and your system is up to date.
Sorry, I don't know what else can be tried. Everything works here.
Update: Looking back on the Xorg.0.log, regarding the
[ 7428.612] (EE) event7 - ELECOM TrackBall Mouse HUGE TrackBall: client bug: event processing lagging behind by 14ms, your system is too slow
[ 7428.947] (EE) event7 - ELECOM TrackBall Mouse HUGE TrackBall: client bug: event processing lagging behind by 20ms, your system is too slow
[ 7469.123] (EE) event7 - ELECOM TrackBall Mouse HUGE TrackBall: client bug: event processing lagging behind by 12ms, your system is too slow
[ 7469.123] (EE) event7 - ELECOM TrackBall Mouse HUGE TrackBall: WARNING: log rate limit exceeded (5 msgs per 60min). Discarding future messages.
lines from your Xorg.0.log, a web search gave the following thread:
https://bbs.archlinux.org/viewtopic.php?id=258638
So maybe try disabling USB autosuspend:
https://wiki.archlinux.org/title/Power_management#USB_autosuspend
Update 2: About the other errors:
[ 6984.511] (EE) client bug: timer event7 debounce short: scheduled expiry is in the past (-18ms), your system is too slow
[ 6988.173] (EE) client bug: timer event7 debounce short: scheduled expiry is in the past (-10ms), your system is too slow
[ 7087.156] (EE) client bug: timer event7 debounce: scheduled expiry is in the past (-10ms), your system is too slow
[ 7087.156] (EE) client bug: timer event7 debounce short: scheduled expiry is in the past (-24ms), your system is too slow
[ 7307.293] (EE) event7 - ELECOM TrackBall Mouse HUGE TrackBall: client bug: event processing lagging behind by 16ms, your system is too slow
https://bbs.archlinux.org/viewtopic.php?id=257606
Update 3: Also a similar issue: https://gitlab.freedesktop.org/xorg/driver/xf86-input-libinput/-/issues/35