Comment 10 for bug 1947115

The gnome platform snap, which the firefox snap relies on for libva drivers, comes with both drivers (i965 and iHD):

    $ ls -1 /snap/gnome-3-38-2004/current/usr/lib/x86_64-linux-gnu/dri/ | grep _drv_video.so
    i965_drv_video.so
    iHD_drv_video.so
    nouveau_drv_video.so
    r600_drv_video.so
    radeonsi_drv_video.so

Can you share the output of:

    MOZ_LOG="PlatformDecoderModule:5" snap run firefox