Firefox 'freezes' at arbitrary times on Debian 12

Firefox presents a reoccurring problem, where its graphical state suddenly stops updating. The browser doesn't outright crash; it's possible to e.g. switch tabs or write something, without anything happening visually. I have found that re-entering from the Activities overview updates the browser's display state to match the actions, but this behaviour is not consistent and does not fix the problem. Everything else on my system appears to work fine when this happens, and rebooting seems to be the only way to fix it. I initially guessed it might be due to some obscure XOrg jank, but then encountered the same problem on my Thinkpad (Debian 12/KDE/Wayland). Does anyone have any suggestions or similar experiences? Any help would be greatly appreciated. (*For reference, I'm running Firefox ESR v115.9.1 on Debian 12, with Gnome 43.9 and X11*)