For me, updating from firefox 97.0.2-1 to 98, some tabs just crash after trying to load, had to revert firefox to the last good version (with installing from /var/cache/pacman/pkg/) and reverted the profile with a btrfs snapper snapshot (reverted ~/.mozzilla)
Note: the tab crashing was mainly with video playback (like youtube) sites (even when stopped while loading in)
i did not try to clean my firefox profile (i dont wanna re-setup everything)
also, vaapi is not enabled (at least no explicitly)
Note: this firefox update was before this manjaro update (but it still lists it as new with this update), but it seems like the version did not change yet, so i did not try to re-install it yet
Not sure why/how/what. My Asus PB278Q monitor (via a DisplayLink Dell 6000-thingy) only has 1080p mode as its highest resolution and no longer offers 2550x1440 as an option. The other monitor from Iiyama does have a 4k mode.
It could be an update from last week (as it showed up before I upgraded on the 14th) but it was good on Friday 3/11.
After the update (since my first message), KDE (Plasma wayland + pipewire) just crashed, but restarted on its own
so i would recommend if using KDE Plasma Wayland (+ Pipewire) to be careful to not have anything important open when installing this update
Update: the restarted KDE was more brocken than it was usable, so i had to reboot (like KDE just dosnt want to start some applications and didnt let me logout, which froze the whole KDE stack)